I think that the perfect editor would use the perfect extension language...which, sadly, does not exist. As a Lisp+Emacs user, I'm biased towards elisp, but it

I think that the perfect editor would use the perfect extension language...which, sadly, does not exist. As a Lisp+Emacs user, I'm biased towards elisp, but it's definitely not perfect, having multi-decade-old baggage that holds it back. Lua has a beautiful design that is geared toward embedding, but lacking metaprogramming capabilities and things like optional typing. Python's design is ugly in many ways that the other two aren't, but it's more featureful than either of them and doesn't have elisp's warts. JavaScript has a more elegant design than Python, but a bad rep and a community that is borderline averse to performance. There is no perfect extension language, and I'm convinced that, for fundamental reasons, there can never be. But, I'll take an imperfect language (again, I'm biased, but I'm very bullish on a Lispy and Lua-y stuff) over none at all.