I second this. At my first Real Job after university, I was challenged by a teammate to learn to use Emacs. He laughed at how primitive my (non-Vim!) vi editor was. In hindsight, it was absolutely true. I bought the O'Reilly book for Emacs and spent many weekends teaching myself the basics.

You are right: Bit by bit you write tiny macros that do things you need or want. After 1/2/5/10/30 years, your personal macros compound to create real efficiency. I don't use Emacs today, but I do appreciate that the ecosystem is enormous and well-developed.