I think it’s grossly undersold personally. What valve has managed is getting the single target platform open source could never agree on.
It’s a small miracle, and it bleeds over into stuff like device driver support in a way I don’t think most people who didn’t deal with Linux in the 2.x era immediately appreciate.
If Linux on the desktop has a surge, they did a lot of the legwork.
I mean it predates a lot of the pervy anime, but Usenet looked the same at the start with lots of Unix/computer boards and an alt.
Computer enthusiasts gonna enthusiastically talk about computers. People who pick up and move to a new platform are likely to be united around being technically competent enough to get there first, and everything else second.