As an emacs user, I have a medium sized .emacs config file. Moving from one emacs to another just imply reinstalling 2 or 3 packages and copying my emacs file. That's no hard work.

And whenever I need to use somene else's emacs, it's even simpler : there's no emacs in the real world :-) (neither vim :-)) I mean those are "niche" editors, not used in huge parts of the IT world. So worrying about their ecosystem is a bit, well, exagerated, imho.