I'm on a 2020 [edit: I got it as part of comp for a contracting gig, is why the overlap in years with my 2014 MBP ownership, but didn't switch to using it for personal stuff until after that was over and my MPB wifi broke] M1 Air now, so close to or in year 6 for that. No issues yet and battery life still stellar, should get at least 2-3 more years.
(Folks who are like "LOL who even needs 18 hours of battery life?", which is a common sort of post on Apple laptop announcements: well for one thing it's extremely nice to be hunting for outlets even less often, and to maybe go on a whole light-laptop-use 3-day trip and not charge it the whole time and it's still alive at the end of it, or to have that battery as reserve for charging your phone, but also and perhaps most importantly, it means that a 30% degraded battery after several years of ownership still gets you 10+ hours of real-world use)
I had the battery replaced, the tab key replaced, and the screen refinished (anti-glare coating removed) for about $240 a couple years ago and aside from the fact it can’t be updated beyond Big Sur 11.7.10 I have no issues.
I was riding the 'service battery' indicator all the way to the bloody end. 1148 cycles, max capacity 3735 mAh.
I used my 2011 MBP daily until upgrading to a 2020 M1 air.
I kinda miss the ridiculous heat output on winter mornings.