Here's the worldwide stats:

https://gs.statcounter.com/os-market-share/desktop/worldwide

Looks like a lot of WIndow's users to me. The stats go back to 2009. For as many folks who croon the about the Mac, you would think they would have buried WIndows by now, but that only seems to be true in the volume of words written, not the stats.

I'm writing this on Linux, but does anyone really want to know why? When it comes operating systems and software, I simply use what works for me. As for backing up...even Jesus saves! If you don't figure how to back up your important work, sooner or later it will come back to bite you.