Everyone has different needs and preferences. Finding something early on and being able to stick with it is great, but many don't find that right away, or things change with their needs or the distro.
Plus it depends also on how long you stick around each time. I know I dipped in and out of dual booting for a long time, only now in the past year settling in well. And each time I tried Linux again, lots had changed so I couldn't just go back to what I used before.
Isn't part of being in the Linux culture to experiment with things, even if it's just the window manager, settings, or particular apps?