>> recently I realized that I read code, but almost never write it.

I think most engineers are reading code than writing it. I find it very hard to not use Emacs when reading large codebases. Interestingly, its mostly because of file navigation. I love using ido/ivy for file navigation, quickly filtering through buffers, magit.

Emacs in terminal is not an ideal experience though. So I can imagine it being multi-fold worse with phone keyboard.