Earlier quoted context omitted.
> Windows is everywhere. Not on the cellphone, smartv, router, supercomputer, webserver or tablet I use. Actually, they all run the same (with some customization) kernel.
The comment was about importance, not popularity. Those aren't mainly used for important work. If people are paying you to use the software, it's probably important to them.
Tablets, smartphones and smart tvs have been of increasing importance on education activities, specially after the pandemic. My router is used for ALL my internet traffic, important or not. Webservers... basically most of what most things people do online. And supercomputers are right now doing high relevancy tasks like running climate models, simulating protein folding, drug interactions and improving vehicle's safety.
I'd disagree those aren't mainly used for important work.