I haven't played in years but even then running your own server was the way to go

It isn't. Cheating is a game culture problem, not a technical problem. Just to counter example. Rust is filled with cheaters precisely because they haven't done everything they can to fix cheating. They are culturally fixated in a single lane thinking. As a result, they're flooded with cheaters (plenty on Windows) who exploit their inflexible strategies. This is top Flanders "we haven't done anything and we are all out of ideas". Linux is not the source of cheating on Rust either, but he's arguing as if it is. He is lazy. That's not bad on itself, but he is also disingenuous and is arguing in bad faith.

Make server side anti cheat and suddenly what OS the player is running becomes irrelevant.

Edit: another contradiction in their argument. Linux was less than 0.1% of the Rust user base. But, Linux was also the biggest source of cheating? How? It is just a disingenuous and dumb argument made to spite Linux out of hatred. It has no basis in reality.

You’re getting downvoted because the truth hurts. Most people are here are not devs on competitive games clearly. What sane developer would multiply their anticheat costs for .01% player growth?

It’s a network effect issue. More people need to game on Linux before it’s relevant enough to support for competitive multiplayer games. Same reason why Riot dropped it.