For 20+ years I did all my coding, development, and miscellaneous tasks in Emacs. But I used vim exclusively for writing emails - initially with mutt, and later with different mail clients.

There were times, now and again, where I'd use vi, or vim, on solaris, or other "weird" systems. But basically I used vim for emails and emacs for everything else, and I think that was a good split.

Were I telling somebody to start a new editor these days I think I'd probably echo the recommendation to use the integrated tutorial, but after that just "jump in". gvim, emacs, and similar have menubars that help with many things before you learn the keystrokes required and there's no shame in using them. The article suggests learning and experimenting before switching, but to me that seems very counter-intuitive.