Kernel anti-cheat systems are currently the bane of Linux/Steam Deck gaming, haven’t actually proven to be effective at stopping cheaters (see Valorant for an example), and lead to various security concerns from giving 3rd parties full access to your machine to being used to install ransomware and malware.
Windows tried to restrict kernel access years ago, but backed down under pressure from various companies. However Crowdstrike’s outages have shown the sever consequences of leaving kernel access open, and we might finally see kernel access to be cut off.
I mean Valorant has a lot of cheaters, it doesn’t really seem like kernel anti-cheat has been more effective than other forms of anti-cheat. There’s also an increasing number of hardware peripherals that offer cheating assistance, and these can’t be detected by kernel anti-cheat because the cheating happens on separate hardware.
My point is that kernel anti-cheat has major privacy and security tradeoffs, which is a steep cost to pay. A steep cost is only worth it if it has a significant benefit to the users, and in practice it doesn’t.