I still use my 2011 macbook air, not as a main driver but still quite a bit. I had to put linux using xfce on it for it to actually work in a non painful way, MacOS not being able to update properly was part of it, I did find a way to force the updates since I thought I may use it for iphone dev and still use xcode on it, but it wasn't viable. It's mostly used for web surfing via firefox, and if I run something like gnome or cinnamon it struggles quite a lot more than xfce.