When one hits a page like https://www.mediawiki.org/wiki/MediaWiki?printable=yes (notice ?printable=yes, there is a warning at the top of the printable page saying
The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.
This was deprecated in MW 1.36. Is it time to remove this feature or is there anything stopping us from removing it in 1.39?
Relevant code
When performing a request, there is a conditional check to set printable styles on the output object
if ( $request->getRawVal( 'printable' ) === 'yes' ) {
$output->setPrintable();
}