I used to think like that, but 10 years ago I decided to create a git-repo for my .emacs.d and started configuring beyond the most trivial settings (and including all dependencies in the repo too). Diminishing returns? Not sure how to measure. Editor configuration was never anything I did because I thought it would somehow save time, as some seem to imply, but rather just about removing sharp edges and making the experience of editing files nicer. With everything a quick git clone away it is rare that I have to work without my configuration.
