nealrichardson commented on code in PR #41451:
URL: https://github.com/apache/arrow/pull/41451#discussion_r1596820650


##########
r/vignettes/install.Rmd:
##########
@@ -28,35 +28,6 @@ For `gcc`, this generally means version 7 or newer. Most 
contemporary Linux
 distributions have a new enough compiler; however, CentOS 7 is a notable
 exception, as it ships with gcc 4.8.
 
-If you are on CentOS 7, to build arrow you will need to install a newer 
`devtoolset`, and you'll need to update R's Makevars to define the `CXX17` 
variables. This script installs `devtoolset-8` and configures R to be able to 
use C++17:

Review Comment:
   The note in the paragraph above also mentions CentOS 7. 
   
   Maybe we should keep this discussion and say something like, we don't 
officially support CentOS 7 anymore, but if you want to try building on it, 
you'll need to: 



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