I'm one of those weird users who works in both, and I've also never really understood the need to pick a side. I initially used emacs for years, and now I've used both for years. I also don't pick a side in the tea and coffee debate, sometimes I want rooibos and others espresso.
Admittedly, my emacs usage at this point is largely to treat it as a collection of distinct apps; fire up in nov-mode¹ mode to read books, fire up in magit-status² to mangle git repository, etc. It really feels like there are a collection of best of breed apps that just happen to built on emacs as a toolkit, most of which are fully functional without buying in to emacs for life(not that I'm saying there is anything wrong with that).
The only time I really use emacs as an actual editing tool is when I'm working on documentation, and that is largely because I like being able to see inline screenshots in that instance. That could equally flip again should I see some feature I want.