[Zak]

> by then lisp might have fallen into the abyss of history

I don't think so, because being a lisp is a trait of a language rather than a specific language. Scheme is a lisp. Racket is a lisp. Clojure is a lisp.

People keep making new ones because lisp continues to be a useful idea. It keeps not quite going mainstream, the reasons for which have been subject to much speculation. It's most likely that there will be some semi-popular lisp in 50 years.

[lispm]

There are languages which have Lisp in their name for a reason: Emacs Lisp, Visual Lisp, ISLisp, Common Lisp, ... Historically Interlisp (see https://interlisp.org ), Standard Lisp (see REDUCE), and many others.