You said 'language'. It did not die at all. The original Lisp and the code written in it was moved through the decades. There is even Lisp code from the 60s which was moved through all the implementations / Lisp evolutions over time:
Lisp I -> a bunch of Lisp 1.5 implementations -> Lisp 1.6 / PDP-6 Lisp -> Maclisp -> Zetalisp, ...
Example: Macsyma was based on code coming from Lisp 1.5 and moved through several generations of Lisp.
I thought it was clear that I was referring to the specific implementation which died with Lisp 1.5.
Because "Raku" refers to a specific implementation name in the Raku-like languages, of which Perl 6 is one. And the Raku evangelist seems to argue that it was incorrect to describe a Raku evangelist as "a Perl 6" evangelist.
I was drawing a parallel. If a modern Lisp system can be referred to as a Lisp, then why can't Raku be referred to as a Perl 6?
Now, I'm perfectly fine with saying this is a sociological question, and that the members of the group get to decide their name. I also think there are limits to that framework. For one, it leads to gatekeeping. If a Scheme or Clojure users says they are using a language in the Lisp family .... I think you see the issue.
> As a point of pedantry, should Perl 6 (the programming language of 4 months ago) be considered a Raku dialect? Or vice versa?
My point was that "Lisp", the original implementation line, died in the 1960s. We have a bunch of implementations now in the greater Lisp family. And we call them "Lisp"s.
So, what is the greater family name which includes Perl 6 and Raku? Is it "a Perl 6"?
The "Family of Lisp" definition in the broad sense you refer to has also been used to include Python, so I know what you mean. However, I think that's excessively broad.
In https://news.ycombinator.com/item?id=21873228 I wrote '"Family" and "superfamily" aren't well defined'. I cannot offer a better definition. However, given my description that the "Perl" family may extend to include Ruby, I think my further request for a "family name for Raku and Perl 6 which excludes the more distant members of the family, like Perl 5" is understandable.