Ages ago, when these warranties first became a "thing", I worked at a store that sold small electronic devices.
The only people I ever recommend them to were people who liked to jog and used Walkman type cassette players - people who would be likely to use them.
When they asked why they should get such a thing, I told them: "How long did your last Walkman last?" and "Which one are you on now?"
It became obvious to them that the 10% cost (later 20%) for 2-year coverage turned out to be a pretty good deal, considering the abuse these devices got.
I have very little hesitation to get it on an iPhone - I tend to like the bigger displayed Pro versions - due to the accident coverage. For a laptop that gets hauled around a lot - good too. For a desktop - I'm sorta hesitant. Only one Mac we bought we passed on AppleCare (iMac G5) and that one was a lemon (We've owned 11 desktops since 2001 or so). My new Studio is a 1st gen device and I know the soldered in RAM, CPU and locked SSD storage means if it breaks out of warranty, I have a huge repair cost or a nice paperweight. 3 years is good enough to get me to the bottom of the bathtub curve. I tend to keep my desktops for 6+ years.
I've also bought a MacBook Air & Time Capsule as a gift to my father-in-law and that for sure came with AppleCare+, as it was a machine I used to wean him off of Windows. That went surprisingly well, and he loves the new computer. Last thing I wanted was a potential issue souring him on the brand. I live too far away to help out, so I wanted to make sure he'd be covered if any problems came about.