I personally hope they never do, because present day anticheat systems are literally closed-source rootkits. You should not let that software onto any computer you own.
But then I don't really have a horse in the race, because I don't find competitive gaming with strangers enjoyable at all.
With what stable module ABI like Windows has? There isn't one.
You can build a module that targets the current kernel Ubuntu 24.04 is using, but that module won't load on 26.04, let alone a completely different distro like Fedora.
eBPF /might/ help, but one could make a module that lies to eBPF.
The notion that there is a meaningful difference between distros here only betrays your lack of knowledge.
FiveM, modded servers for GTAV, had anticheats before Rockstar added any which already prevented Linux players. Face IT for CS2 does the same.
- Quickplay
- Server / Game / Match finder
- LFG - for a more detailed search
Each of these has a different use case, and a single user may make use of all of them (I include myself here). Not everyone wants to just click "play", it's very dependent on the type of game.
Helldivers 2, for example, implements the first two. Destiny/Destiny 2 has mostly the first one. Destiny on Xbox has a XBL-provided LFG functionality (but prior to that external sites were used). You really needed LFG for finding a raid group.