I'm not convinced Framework actually supports Linux, though. AFAICT, it supports Windows and can ship with no OS, and you have to do the rest yourself. To predictable end (e.g. having to deal with kernel parameters to make it work.)
The firmware involved is also distinctly non-trivial.
That's actually one of the big reasons I've held off on buying one (although the #1 reason is lack of AMD options), and am eyeing laptops from HP and Lenovo that actually advertise full Linux support (like the HP Dev One).
Even if those laptops don't support Linux as well as they claim to, it seems like it'd be less of a headache to deal with than Framework with their unique dongle situation.
The firmware involved is also distinctly non-trivial.