The reason I've used a MacBook Pro for so many years is because it really does "just work," or at least consistently has in the past. It's very, very rare (in my personal experience) to run into any system-related issues. I used to run Linux on a laptop and spent ages fiddling around with my Xorg, troubleshooting wireless issues, dealing with buggy desktop environments, etc...
I think a lot of other people are in a similar position, in that the "neat things" and "fiddling" are a negative. I just want a machine that works well with minimal configuration. Is desktop Linux at that stage right now? Popular opinion seems to say no, but I haven't actually tried running desktop Linux since for years.
(I do use Linux every single day, but it's always over ssh/tmux)