This press piece is specifically about their client software for streaming. The actual host PC is likely a Windows PC specifically for these kinds of compatibility purposes I'd imagine.

Nvidia's infrastructure is somehow whitelisted. They support pretty much every game with invasive kernel level anti cheat, at least those from Microsoft / Xbox Game Studios (notably Activision Blizzard's Call of Duty series), and Electronic Arts (Battlefield, FIFA and the like).

I don't know if it's me, but right now nvidia on Linux is the least stable it's ever been. I have two desktops, one dedicated Linux box and one I dual boot. On the Linux only one I bought a dirt cheap ($30) Radeon Pro WX 3200 so my system won't crash constantly. I still have the nvidia card for CUDA stuff. It's working great for what I do.

I have a second used Radeon on the way for the other system. It's insane, but this is the only solution. If my monitor turns off or I switch inputs, I can't get it back when connected to the nvidia cards. I've done every troubleshooting step I can find, it's just a broken ecosystem.

They are serious about Linux drivers, after all their main research OS is a Linux distribution.

Which is naturally not what the FOSS community wants.