Many people prefer to get new devices so that they can be covered by Apple Care. That completely removes Linux as an option because Asahi Linux never supports any of the recent models.
"Buy this computer, it's several generations behind and a bunch of stuff doesn't work" is not a ringing endorsement, even if it does work well enough for you.
Just to add, I also do my work from an M1 MacBook that I crammed Asahi onto. I got it used for a few hundred dollars last year and it's a perfectly fine experience (for me).
We’re already almost halfway through this year. A demo half a year ago isn’t shipped. This is like when Apple demos something at WWDC that doesn’t ship until 9 months later in spring the following year.
Everything else just works. What is the problem?