I'm surprised at how well this MB is doing even with a patch to install Sierra (not sure I'm going to do High Sierra, seems like the hardware doesn't have any capabilities to make it work any better + the features are moderate at best). We shall see how next year goes. I'd like to get a new new Mac, but maybe another used one wouldn't be so bad.
That's good to know about the air. For some reason, the sturdiness of the MacBook is exactly what I'm looking for. The screen isn't too small or too large (like a 17" laptop I've had or the 15.4"). I thought about a MacBook, but for the price, why not a Pro? We'll see.