This thread has a special focus on switching the operating system from macOS to Pop_OS. In this context, mentioning missing features between the operating systems is valid.

I don’t really like the snide nature of your comment, people care a lot about things like trackpad functionalities. Objectively, unix has been lacking in this department.

(actually swipe movements, but pinching movements is the same idea)

In my case (and I suspect many others) a case of muscle memory, which can take a while to retrain, so you move to a new OS hoping you can keep the same motions you're used to and just get your work done. It's also important if you regularly have to use multiple OSes (as some tech support people have to do, and when you need to test on different OSes)