As for ARM laptops, I’m afraid they will be windows only, secure boot or whatever, no GPU drivers, maybe even no wifi on Linux.

Considering Asahi Linux exists which makes Linux on M model MacBooks possible, yet Apple is notorious for locking down their stuff and giving no hardware documentation whatsoever, I wouldn’t say that outright. Secure Boot should allow you to enroll your own keys, for example…

Although it would also be extremely funny for the only mainline ARM laptops that can run Linux to be MacBooks.