kadu

There’s no world where Windows users only use the official store. In fact, that’s why every “S” version of Windows always failed.

but also plenty of pitfalls from an OS sec POV.

Can’t possibly be more vulnerable than Windows, the system where you can elevate yourself to highest privileges by simply clicking “Yes” on a prompt without a password, and where most users are running outdated versions of their software because they never update anything, or have a thousand background “updater” applets that are scheduled to run periodically and have the ability to install arbitrary executables from their servers.

It doesn’t “need” to be anything. It could be a DKMS module that is mandatory for playing a game.

Whether people would like it and use it is a completely different story.

Absolutely nothing prevents somebody from writing a kernel level anticheat on Linux.

Users would throw a fit, and it would be way easier to bypass, but it certainly could be made.