I imagine there might be a lot of embedded toolchains that only run on windows, so I can see that being used there. But in my experience the vast majority of web development (here in the UK at least, but I get the impression it's similar in the US and the rest of Europe) is done on macs. And you can see that reflected in the software support. Languages/ecosystems like Python and Ruby still don't have support for Windows that's on par with mac/linux support.
Yeah I take back what I wrote for web-dev. Although I find Linux broader than Mac Os in this case because the server side is likely to be Linux in prod and never Mac Os, and in some complex cases it will also be Linux in dev. But even with that, yes big parts of web-dev take place on Mac Os.
