Earlier quoted context omitted.
> Sorry you made your first gen chip so good that I don't feel the need to upgrade M1 MacBooks are ~5 years old at this point, and if you've been working a laptop hard for 5 years it's often worth getting an upgrade for battery life as well as speed.
I still have 94% of my battery health left on my 2020 M1, and I have all the speed I need as a casual, avergae user.
I haven't booted up the older M1 recently to check, but I remember it was throwing replace battery warnings well before I got the upgrade and that I think that triggering below 80%.