I revisit my emacs config once every year or so, but otherwise I leave it along and focus on using emacs instead of tweaking emacs. From what I've heard, some emacs users seem to get addicted to tweaking emacs, so much so that it distracts them from their real work. But that's just not something I can relate to myself, nor is it something I've witnessed from my emacs-using coworkers and friends. I've also perceived an uptick in hand-wringing about such emacs-tweaking in the past few years, seeming to correlate with an uptick in handwringing against GPL licenses and GNU in general, and I wonder if agitation with RMS has something to do with it.