post-merge updates: pow/mining

src/content/developers/docs/consensus-mechanisms/pow/mining/index.md

@@ -1,49 +1,48 @@
 ---
 title: Mining
-description: An explanation of how mining works in Ethereum and how it helps keep Ethereum secure and decentralized.
+description: An explanation of how mining worked on Ethereum.
 lang: en
 sidebar: true
-preMergeBanner: true
 ---
 
 <InfoBanner emoji=":wave:">
-   Proof-of-stake will soon replace proof-of-work as Ethereum's consensus mechanism, meaning mining will be switched off. Instead, Ethereum will be secured by validators who stake ETH. You can start staking your ETH today. Read more on <a href="/upgrades/merge/">The Merge</a>, <a href="/developers/docs/consensus-mechanisms/pos/">proof-of-stake</a> and <a href="/staking/">staking</a>.    
-</InfoBanner>
 
+   Proof-of-work is no longer underlying Ethereum's consensus mechanism, meaning mining has been switched off. Instead, Ethereum is secured by validators who stake ETH. You can start staking your ETH today. Read more on [The Merge](/upgrades/merge/), [proof-of-stake](/developers/docs/consensus-mechanisms/pos/), and [staking](/staking/). This page is for historical interest.
+
+</InfoBanner>
+
 ## Prerequisites {#prerequisites}
 
 To better understand this page, we recommend you first read up on [transactions](/developers/docs/transactions/), [blocks](/developers/docs/blocks/) and [proof-of-work](/developers/docs/consensus-mechanisms/pow/).
 
 ## What is Ethereum mining? {#what-is-ethereum-mining}
 
-Mining is the process of creating a block of transactions to be added to the Ethereum blockchain.
+Mining is the process of creating a block of transactions to be added to the Ethereum blockchain in Ethereum's now-deprecated proof-of-work architecture.
 
-The word mining originates in the context of the gold analogy for crypto currencies. Gold or precious metals are scarce, so are digital tokens, and the only way to increase the total volume is through mining. This is appropriate to the extent that in Ethereum too, the only mode of issuance post launch is via mining. Unlike these examples however, mining is also the way to secure the network by creating, verifying, publishing and propagating blocks in the blockchain.
+The word mining originates in the context of the gold analogy for cryptocurrencies. Gold or precious metals are scarce, so are digital tokens, and the only way to increase the total volume in a proof-of-work system is through mining. In proof-of-work Ethereum, the only mode of issuance was via mining. Unlike gold or precious metals however, Ethereum mining was also the way to secure the network by creating, verifying, publishing and propagating blocks in the blockchain.
 
 Mining ether = Securing the Network
 
-Ethereum, like Bitcoin, currently uses a [proof-of-work (PoW)](/developers/docs/consensus-mechanisms/pow/) consensus mechanism. Mining is the lifeblood of proof-of-work. Ethereum miners - computers running software - using their time and computation power to process transactions and produce blocks.
+Mining is the lifeblood of any proof-of-work blockchain. Ethereum miners - computers running software - used their time and computation power to process transactions and produce blocks prior to the transition to proof-of-stake.
 
 ## Why do miners exist? {#why-do-miners-exist}
 
-In decentralized systems like Ethereum, we need to ensure that everyone agrees on the order of transactions. Miners help this happen by solving computationally difficult puzzles to produce blocks, securing the network from attacks.
+In decentralized systems like Ethereum, we need to ensure that everyone agrees on the order of transactions. Miners helped this happen by solving computationally difficult puzzles to produce blocks, securing the network from attacks.
 
 [More on proof-of-work](/developers/docs/consensus-mechanisms/pow/)
 
-## Who can become a miner on Ethereum? {#who-can-become-a-miner}
-
-Technically, anyone can mine on the Ethereum network using their computer. However, not everyone can mine ether (ETH) profitably. In most cases, miners must purchase dedicated computer hardware to mine profitably. While it is true anyone can run the mining software on their computer, it is unlikely that the average computer would earn enough block rewards to cover the associated costs of mining.
+Anyone was previously able to mine on the Ethereum network using their computer. However, not everyone could mine ether (ETH) profitably. In most cases, miners had to purchase dedicated computer hardware, and have access to inexpensive energy sources. The average computer was unlikely to earn enough block rewards to cover the associated costs of mining.
 
 ### Cost of mining {#cost-of-mining}
 
 - Potential costs of the hardware necessary to build and maintain a mining rig
 - Electrical cost of powering the mining rig
-- If you are mining in a pool, mining pools typically charge a flat % fee of each block generated by the pool
+- If you were mining in a pool, these pools typically charged a flat % fee of each block generated by the pool
 - Potential cost of equipment to support mining rig (ventilation, energy monitoring, electrical wiring, etc.)
 
 To further explore mining profitability, use a mining calculator, such as the one [Etherscan](https://etherscan.io/ether-mining-calculator) provides.
 
-## How Ethereum transactions are mined {#how-ethereum-transactions-are-mined}
+## How Ethereum transactions were mined {#how-ethereum-transactions-were-mined}
 
 1. A user writes and signs a [transaction](/developers/docs/transactions/) request with the private key of some [account](/developers/docs/accounts/).
 2. The user broadcasts the transaction request to the entire Ethereum network from some [node](/developers/docs/nodes-and-clients/).
@@ -66,9 +65,9 @@ Watch Austin walk you through mining and the proof-of-work blockchain.
 
 ## The mining algorithm {#mining-algorithm}
 
-The Ethereum mining algorithm has undergone several upgrades since its inception. The original algorithm, "Dagger Hashimoto" was based around the provision of a large, transient, randomly generated dataset which forms a [Directed Acyclic Graph](https://en.wikipedia.org/wiki/Directed_acyclic_graph) (the Dagger-part), with miners attempting to solve a particular constraint on it, partly determined through a block’s header-hash. This algorithm was novel because it had high memory-access bandwidth requirements but could be run using a modest processor, making it GPU-friendly but resistant to the type of ASIC-driven hardware arms race that could pose a centralization risk (more on [problems with ASICS](https://www.investopedia.com/investing/why-centralized-crypto-mining-growing-problem/)). After substantial upgrades to the algorithm, it was renamed to "Ethash". This renaming happened before mining began on Ethereum mainnet. Dagger-Hashimoto was a precursor, research algorithm that was not used on Ethereum mainnet.
+Ethereum Mainnet only ever used one mining algorithm - ['Ethash'](/developers/docs/consensus-mechanisms/pow/mining/mining-algorithms/ethash). Ethhash was the successor to an original R&D algorithm known as ['Dagger-Hashamoto'](/developers/docs/consensus-mechanisms/pow/mining/mining-algorithms/dagger-hashamoto).
 
-More information on these mining algorithms is available at our [mining algorithms page](/developers/docs/consensus-mechanisms/pow/mining-algorithms/).
+[More on mining algorithms](/developers/docs/consensus-mechanisms/pow/mining-algorithms/).
 
 ## Further reading {#further-reading}