I was in the same boat with an M1 Pro I loved, but the display on mine died, and a replacement is about £800, which is bonkers. So now it's tethered to the monitor on my desk.
I just replaced a battery on a mid 2012 retina macbook pro and set it up for my kids to use and I was amazed and how much it does basically everything just fine, which for them means playing videos and some light gaming. screen looks great still, keyboard is actually a bit nicer than the current one with a bit more travel. Speakers are terrible though.