The analogy to text editors is bad though, since everyone can choose the UI they like for text editing, whereas for source control the choice of UIs is much red

The analogy to text editors is bad though, since everyone can choose the UI they like for text editing, whereas for source control the choice of UIs is much reduced. In other words, I can choose Vim/Emacs, slog away and get proficient, and someone else can read my code with notepad. With VCS, I'm asking casual and hardcore users to use the same UI, so it better appeal to both.