Speak for yourself I suppose. I can hop between Linux (KDE, Gnome, whatever) and Windows and still feel like my muscle memory for OS interactions and application shortcuts still works. There are minor differences, but things like copy and paste still work properly.

When I try to use a Mac, everything is just ... different. CMD instead of Ctrl, buttons on the other side of windows, inconsistent maximize logic between programs, whatever Finder is supposed to be doing with folder navigation. It's certainly learnable with effort, and I can move around the OS competently now with some practice, but it's just unpleasant enough that I'd rather not use it as my daily driver.