This is huge. I was beginning to lose hope we'd ever see a big budget high-profile non-indie get a Linux port ever again.

I would be a little bit surprised if it doesn’t also work on Linux desktop. They’re probably just saying “don’t ask us to fix it if it breaks, we never said it would work”

Still lame

Nope. If you pick the Linux version on a desktop Linux it doesn’t even have a binary, so the game can’t launch. On normal Linux you have to pick the Proton version. The Linux binary only downloads on Steam Deck.