My take on that is... For those fundamentally interested in developing development environments, coding tools, or making your editor your hobby, diving deep in

My take on that is... For those fundamentally interested in developing development environments, coding tools, or making your editor your hobby, diving deep into emacs customization is a reasonable thing to do. In other words, if creating things like evil-mode or spacemacs excites you, a dive deep into emacs is a good option. For those who aren't interested in those things, try to actively avoid deep diving into emacs. It will be an unfulfilling waste of time. There's no magical developer productivity pot of gold at the end of that rainbow.