I think you got a point that some emacs users might severly underestimate the power of limited choices and pre-configured workflows. However, as in understood Blub, this is strictly about power of expression. I think emacs is at the top of the foodchain here, at least I don't know a text editor that would be extensible with such easy as emacs.

Same with the LISPs (which Blub is about btw) - Some LISP programs become unmantainable for people that did not write it, but without a doubt, LISP is one of, if not the most expressive language there is.