They just show the icons now, not the plus symbols. That way it shows the only the applicable platforms.
Yeah. Not saying it doesn't need to be fixed... just now we don't have a need for a single file.
Closing as the referenced page appears to have been updated.
Nothing extracted yet.
https://support.steampowered.com/kb_article.php?ref=9439-QHKN-1308
SteamPlay now supports Linux, but this article doesn't make reference to it. Here's an update to the graphic, too, that's inside of said article:
platform_steamplay.png:![platform_steamplay]()