[pseudonym]

For me personally, 90% of it boils down to "unix baseline". I do most of my development work remotely on linux servers of varying flavors, but OSX + homebrew means that I can pretty easily use the tools I write for one machine on my local systems as well.

Beyond that, I've just got a lot of random applications for streamlining my workflow and day-to-day usage that would take a long time to find equivalent tools for, and I'm long past the days when "spending a weekend fucking with settings" was something I want to do. OSX, I just back up my machines and if/when I need to replace them, it's just "plug the new one into the backup drive, restore from backup".

Maybe someday the year of the linux desktop will actually happen, but I'm not holding my breath either.