The ‘normal’ way to redefine words in forth is a bit of cheating, though. Redefining a word merely introduces a word with a name that shadows that of the old, still existing word.
Words created before the definition still call the old implementation, and, depending on the implementation (a phrase that, I think applies to about any statement about forth) you can still find it when you walk the dictionary and call it.
Smalltalk is missing too, and that’s a bigger omission. When you redefine a function there, it starts getting used everywhere.
I wonder what a blog post written about this 50 years from now will look like. Would it still mention C and lisp? Would readers of said article still mention forth and smalltalk as missing? Also, what reasonably successful languages from the ‘60s/‘70s already are gone from the collective mind?
Being used today to write very popular OSes, I see C still being mentioned, but by then lisp might have fallen into the abyss of history (except for, probably, a few computer historians)
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.
MicroEngenho: https://www.youtube.com/watch?v=Mu9CsdGHybw
EDIT: YouTube link