I'm in the same boat with my circa-2010 Macbook Air. Its still supported as it has an i5, but its ancient by today's standards. Still holds a 3+ hour battery ch

I'm in the same boat with my circa-2010 Macbook Air. Its still supported as it has an i5, but its ancient by today's standards. Still holds a 3+ hour battery charge on its original cells though, boots in under 20 seconds on SSD (running 10.12 on it, haven't taken the High Sierra plunge), and everything on it works. I'd love to have more RAM and a retina display but tbh, it ain't broke so I'm not replacing it and when/if I do, it will likely be replaced with the 2016 version that just upgraded the RAM and I'll use it for another decade.