There's a plethora of reasons, especially today. I used to do the whole "Windows for gaming, Mac for productivity" thing, but as time went on I started to really hate macOS. The first pet peeve of mine was Spotlight and it's file indexing, which would always melt my computer whenever I cloned repos or did anything outside of a blacklisted folder. Eventually I just disabled the file search altogether. Finder was also never my favorite file manager, but a lot of the reasons really just boiled down to HFS and APFS being really annoying to use, and Apple's own idea of how files/folders should behave. I never quite understood it, and Finder never felt like it helped me make sense of all the "magic".

Unrelated to your work (of course, nothing personal though), I really started to hate the time I spent developing on Mac. Deploying to Linux machines while running a decades-old FreeBSD amalgam kernel was an unbelievable pain in the ass, and I wound up spending more of my time fixing Mac stuff than actually developing software. The lack of a package manager burned me up too, since both Macports and Homebrew had their own issues that simply wasted too much of my time. About 3 years ago I pulled the trigger and switched my main machine to Linux, and I've never looked back since. Seeing that Apple is ditching x86 now, it looks like I made the right call (at least as a developer). Simply put, I spent too much time trying to make MacOS behave like Linux, and I was tired of constantly losing control/options.

The worst thing for me is slow docker performance. Not usually an issue on my work MacBook since I tend to do stuff on remote build servers, but it can be really annoying to spin up projects on MacOS without polluting your OS with all the dependencies.