I still do all my work on an M1 MBP ¯\_(ツ)_/¯

That’s wonderful for you and apple.

What does Apple gain from this scenario?

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).

Same. If not for the required hardware refresh in our company I would have used it until it broke.