summarise_all() deprication

[zakvarty]

dplyr::summarise_all() is superseded. This is a softer alternative to deprecation.

A superseded function has a known better alternative, but the function itself is not going away . A superseded function will not emit a warning (since there’s no risk if you keep using it), but the documentation will tell you what we recommend instead. Superseded functions will not receive new features, but will receive any critical bug fixes needed to keep it working. In some ways a superseded function is actually safer than a stable function because it’s guaranteed never to change (for better or for worse).

Scoped verbs (⁠_if⁠, ⁠_at⁠, ⁠_all⁠) have been superseded by the use of pick() or across() in an existing verb. See vignette("colwise") for details.

Switch usage and description in data wrangling chapter and elsewhere.