Users of Vim and similars, what exactly makes it useful compared to other text editors? How much time do you suppose you save when working with it?

I'd like actual examples instead of "I work faster", something like "I can move straight to the middle of the file with 7mv" or "I can keep 4 different text snippets in memory and paste each with a number+pt, like 2pt", things that you actually use somewhat frequently instead of what you can do, but probably only did once.