Certainly. The 2.4 kernel and IBM embracing Linux at around that time pretty much made all proprietary Unix legacy.

The desktop took longer with less well-defined transition points and, arguably, MacOS with its BSD foundations (and command line option) ended up being a good alternative for a lot of the non-Windows crowd--though Windows is still dominant as a desktop/laptop OS. (Windows/Azure are, of course, still major in backend corporate environments as well.)