I have never tried one, I'm not interested in Apple's walled garden approach. Buying a Macbook and being unable to put a (properly working) alternative OS on it if I don't like the one on it is a non-starter to me.
Asahi Linux is definitely a "properly working" Linux distro at this point. MacBook hardware tends to be better than almost all the alternatives I've tried.
Agreed that lack of m4+ support is unfortunate but it'll get there. However, m2 MacBook still outperforms any other kit I have (dell developer edition shipping with Linux etc.) Also external displays work today as long as you use a USBC display port cable, the other USBC video standards are supposedly in the works but display port dongles aren't exactly hard to find.