I believe that markdown editors belong into a certain group of software, which are seemingly simple, but people are for some reason pretty picky about features,

I believe that markdown editors belong into a certain group of software, which are seemingly simple, but people are for some reason pretty picky about features, UI, and so on. Other members of this group are music/media players, simple organization tools (e.g. time-tracking, to-do), and of course coding-related text editors. I think I had one or two more examples, but don't remember right now. And this leads to a lot of tools being very similar on surface.