They don't mean all games thru all times, they mean "the latest $70 release" that still can have problem if it is multiplayer DRM/anticheat ridden one.
I haven't booted windows in months but there is definitely some caveats for gamers
It doesn't have to be "the latest $70 release", there are plenty of games that are many years old now that still don't work because of KAC.
This. I’d move to Linux in a heartbeat if certain anticheats for certain competetive games had supports for it. (i.e. faceit anticheat)
On the other hand, those who find contemporary game development trends distasteful might find much to like about the fruits of the Debian Games Team's work on game-data-packager.
https://game-data-packager.debian.net/available.html
The games on that list have native ports that can be integrated into the Debian environment just by installing packages, and the game data packages can be automatically generated from each game's official install media.