Homework.

College used linux because I did computer science.
Topic: concurrency. College then gave us a programming assignment that required adding a code library, which I had never done before or even heard of, and thus did not understand.
Since this was a library that was platform-specific, they had made one library for linux and one for windows.
Way too late I got the gist of it but still couldn't install the library.
Since the question contained the linux directory structure I was convinced that the windows library was broken and every other college student finished this task in Linux.
Thus I installed Linux.
Ten years later I understood and finished the assignment.