Yeah we’ll see
You can be sure that MS finds a way to either bust it or make it anticompetitive.
Sometimes kernel level anti-cheat is good for the consumer, actually.
I was about to relapse and install league of legends, but then vanguard for league was announced, which immediately cured me <3
The anti-tampering solution sounds like some trusted computing bullshit like on mobile where banking apps will refuse to run if your device has a custom rom or non-locked boot loader. This would be how anti-cheat software could continue to lock out linux.
My solution to games not supporting Steam Deck/Linux is to simply not buy/play it. It’s not much but it’s honest work!