Microsoft has long wanted to get vendors out of the kernel. It’s a huge privacy/security/stability risk, and causes major issues like the Crowdstrike outage.
Most of those issues also apply to kernel anti-cheat as well, and it’s likely that Microsoft will also attempt to move anti-cheat vendors out of kernel space. The biggest gaming issues with steamOS/Linux are kernel anti-cheat not working, so this could be huge for having full compatibility of multiplayer games on Linux.
FF14 and BDO for example still have GMs but they are woefully understaffed. This is the more common reality.
Few to no mmos have zero GMs. They just frequently only work for like an hour a day doing spot checks are under staffed and mostly just are email support.
The old days of gms frequently being actively in-game to reach out to 24/7 isn’t a thing anymore.