Nah, it was:

- People who wanted a Unix workstation could build one cheaply on commodity hardware with Linux

- SGI, HP, Sun, and others didn’t adapt to Linux’s disruption quickly enough. So much fucking about with Itanium.

- NT became good enough such that if you didn’t care whether it was Unix, you could actually use Windows.

- Mac OS X — the only Unix that’s ever managed to be user friendly in the true meaning of the term — ate the rest of the market. (You _could_ build a version of Unix that has a nice GUI and isn’t the Mac, but people are so wedded to X11’s 30 years of misfeatures.)