I share your opinion. I started my undergrad CS program in 2004, and familiarity with a Linux / Unix shell was a de facto expectation. The school and CS departm

I share your opinion. I started my undergrad CS program in 2004, and familiarity with a Linux / Unix shell was a de facto expectation. The school and CS department servers that we had to use ran Linux. The tools that we had to use were all open-source, Linux-first. I remember asking for help once and having an upperclassman scoff and say that he couldn't help me, with my Windows machine and GUI, because he just used some command line tool. I don't think I had heard of Linux before that time, and within a few months I realized that I needed to immerse myself by wiping Windows from my laptop and using Linux for all my day-to-day stuff. Many people opted for a Macbook instead because it gave them the same command line interface. So I think that Windows has never been the majority OS among computer scientists and, therefore, developers.