Kernel level cheat engines (not VAC) will catch you on a different OS 100% of the time. EAC is vastly more popular for detecting in game cheating, versus VAC which scans the users computer for possible cheats and typically doesn't work well when it comes to preventing cheating if at all.
Many companies invest heavily in kernel level anti-cheat and having to support multiple OS's when the other two big OS's account for less 0.5% of the profit, I just don't see business folk lining up to ensure non-windows users can play video games given the fact it's probably Microsoft making or publishing the game in some capacity.
Could change if Linux numbers on Steam hit double digits, though.
Anyways, from what I am seeing from tech trends, the future is multi-platform, and it's only becoming easier to code for everything all at once. Smart people are taking time and energy to research things like WASM and APE (which supports Cosmopolitan Libc), not to mention long-running initiatives such as containerization, the various JS engines and other languages which run anywhere, etc. Even with ARM vs x86 happening, software runs cross-platform more and more.
Edit: I am "posting too fast" it seems (a few messages per hour, I guess?), so here's a response to a comment below here about the mixed-OS household:
I wouldn't mind using macOS or Linux, and I actually would pay if I could install macOS on my PC tower. I might be the idiot here, jumping out of the MS frying pan into the Apple fire, but I find macOS to be just fine for my use, and not too locked down overall when it comes to running the software I need on it and it's very well integrated with some of my other tech stuff. Sure, I can't tweak every aspect of the OS, but I don't mind how it works out of the box so I am cool with that. It would also be nice if I could use some of the macOS features on other platforms, like iCloud, Messages (whatever the blue-bubble messages are called), and iPhone integrations.