Hardly. Market share is still roughly 85% Windows, 15% Mac, and fuck-all % Linux, which is reflected in the level of support provided for applications, games, hardware etc. Even disregarding compatibility, MacOS is not a straightforward alternative as it only runs on Apple hardware, which is very expensive and only offers a narrow range of opinionated designs.
This is way too non-inclusive, but at least it's something:
https://www.pcmag.com/feature/302767/9-companies-microsoft-d...
In the 80s Microsoft under Bill Gates was extremely fierce. Silicon Valley software companies lived in constant fear.
There was a bunch of well-documented market abuse using the control of the OS (MS-DOS).
Further reading: