The Year of Desktop FOSS UNIX died when NeXT reverse acquired Apple, and made NeXTSTEP the foundation of OS X.

Suddenly everyone that only cared about some form of UNIX/POSIX, regardless of the source, went into droves into the Apple ecosystem.

These are the same folks that nowadays complain about leaving macOS for some Linux/BSD distribution, as they didn't grasp the actual Apple/NeXT developer culture (see Steve Jobs famous jabs at UNIX in its traditional form).

Microsoft with WSL is kind of approaching the same crowd, those of us that were already happy enough using a mix of VMWare Workstation, Virtual Box, cygwin/migwin, that have had enough of dual bottling, and the usual "everything works but".