This used to be a much easier choice, but it no longer is (unless you are an avid gamer, in which case build a Windows gaming rig and then have a second 'work' computer that is whatever OS you want).
The fundamental issue is this: The Mac used to have massive advantages in terms of UI, stability, and the ease of doing many critical tasks (for example, try easily making a bootable clone of a Windows machine to a hard drive that's smaller than the original, or larger without having to go work magic on the partition to recover otherwise lost space; it's a freaking nightmare). The Mac made things like extensive numbers of multiple-monitors and huge-raid arrays easy. And then once they moved to Intel they ran Windows too, at full speed. So about the ONLY thing they didn't do pretty darn well was cool themselves and run games (except the *real* MacPros, which were great at these things). Windows machines, on the other hand, had massive advantages when it came to overall flexibility (both hardware and software) and appealed to enthusiasts, gamers and hobbyists. It's a lot of fun building your own gaming rig, for example. Ultimate speed, power, and flexibility were definitely on the Windows side of things, but only when we were talking about high-end requirements (since a Mac running Bootcamp could handle everything except the very top-tier stuff like VR). But Windows rigs had major disadvantages; worse UIs, worse stability, fragile driver ecosystem, and considerable difficulty when you wanted to do many of things that were easy on the Mac (like build raid arrays, boot from external drives, reinstall the OS on a non-bootable drive without losing data, clone bootable drives, the list just goes on and on).
But over the last dozen or so years their positions have been slowly converging: On the Windows side the stability and the UI have gotten better, (OTOH Microsoft forces updates that completely bork systems on a routine basis, which is moronic beyond comprehension.) On Windows systems many things that used to be hard (raid arrays, huge numbers of monitors, ease of device integration, finding reasonably good software) have gotten much easier. Overall the Windows experience is vastly, vastly, better than it once was. On the Mac side, unfortunately, almost everything beyond "basic user" needs has been borked by Apple. The UI, with Big Sur, has degraded into one of the worst I've ever seen, period. Multiple-monitor use has been greatly reduced and systems can no longer even boot from RAID arrays. Making bootable clones on M1 machines has proven incredibly difficult for many and even booting from external media requires additional security steps.
Or put succinctly: the vast majority (but not all) of the things that were bad about Windows boxes have gotten better, while the vast majority (but not all) of the things that were good about Macs have gotten worse. It's no longer an easy decision at all.
