I had a couple of MBA which I sold as the new ones arrived, and have lived with the 2012 since. Now that it can't update OS, it's starting to become a liability.
It will sit on a shelf with the Ti 667 DVI (a wonderful creation), Intel core 2007, Intel core 2 2009 (significantly better laptop + still runs music software), old mac mini - still fine but no support - perhaps this could be resurrected as a network device (running freeBSD?). idk, the reality is most of this hardware is fine, but no OS updates, that's the real issue for me now.
I actually really like my mba 2012, new battery, new drive (self serviced), it was the perfect laptop.
Although, hm, sidecar is a pretty cool feature these days... but I am truly glad I did not get done over with a butterfly keyboard. I can recall the 2006/7 models also had a nice keyboard, but I also had keyboard failure. These were super hot running laptops.
But all in all, amazing how computers are now such commodity items (old joker writing this, you guessed it).