A colleague of mine recently got a MacBook Pro, whenever they plug in an external monitor the fans are pretty much fully on when doing not much at all. They now loathe using it. These computers are so expensive. They seem to have a ton of issues with ridiculous repair costs. What's going on? The keyboard issue from before is another example. Clearly they have the profit margin to ensure their products work well. And…
The keyboard issues were really jarring precisely because Apple had, up to that point, a really great reliability reputation - in my experience, on par with the super-overengineered late-90s ThinkPads (IBM, not Lenovo).
I retired several PowerBooks and MacBooks at 6 or 7 years old that were still physically fine, but no longer appealing to use for Moore's Law reasons.
My wife's using my old 6 year old 13" Pro, and while I now find the keyboard weird, it's utterly capable of anything she needs to do with it -- which is pretty much a regular human duty cycle (ie, she's not running virtual servers on it like I was in its initial life).
We then passed on the small Air she'd been using for like 8 years; it's in daily use at a friend's house now as a spare platform (which turned out to be a big deal, given quarantine). My guess is that Intel Macs are about to hit a gate with the shift to ARM, and you won't be able to get 8 years out of one purchased in 2020, but I could be wrong about that. (I mean, I definitely am if you have relatively simple needs -- even if you get stuck at the last rev of Intel-friendly OS X, there's software for you there that will keep working.)