I mean, I tried to become an emacs person several times when I was still coding, and it just never took. My last phase of programming work was on OS X, so I had friendlier yet still capable options like TextMate, which made shifting to emacs a pretty hard ask.

Then my job shifted to a point where my preferred method of tracking activites/tasks/notes was just falling apart. I was all-in on the GTD-inspired Omnifocus, but what I really wanted was a system where I could intermingle notes with Todo items, and then ask the system to collate a list of the Todos for me dynamically.

Which, as it turns out, is pretty much a description of how OrgMode works. And, sadly, almost nothing else that I've found, and so I use emacs all the time now.

My emacs expertise, though, is pretty limited to things I need to know to be productive with Org.