Approximiately 60-70% of desktop / laptop users worldwide use Windows according to wikipedia.

https://en.wikipedia.org/wiki/Usage_share_of_operating_syste...

The big problem with shifting users from Windows is training. Corporations aren't going to pay to train their employees in something new if they don't absolutely have to. With that said, now that Windows workstation prices going crazy because of RAM/storage/GPU inflation, I hope that we see a shift to more memory efficient operating systems (anything based on UNIX like Linux and MacOS) but need 2x-8x memory (along with fast storage) to have a similar experience running Windows 11.