Open source is rarely competitive anyway. There are rarely situations where the free version is better the the proprietary version, and even then it's subjective.
Libre Office is just as good, but then again a lot of people who don't remember Microsoft Office prior to 2006 might think that the layout is weird and looks incredibly antiquated.
Even with good desktop Linux distros like Ubuntu, I usually only run them on a virtual machine on Windows because Linux still has too much bullshit to be ready for the mainstream. I still use Ubuntu as a desktop OS within a virtual machine.
Linux has decimated Windows in the server market. It would be unthinkable for a new project to use Windows server, even Azure assumes you want to use Linux.
There are lots of industrial applications where open source has dominated the market. As the end user you might not see it, but almost all software and digital infrastructure you use has open source components.