Hi Jason,
this mailing list is about administration of the common-lisp.net server; nonetheless I can offer my _personal_ opinions.
I have some questions about the CL and I'm thankful if anyone replies to them based on the question number:
1- Why isn't Lisp updated anymore?
Because it became an ANSI Standard in 1994; you don't simply change standards on a whim.
OTOH, see https://github.com/cl21/cl21.
2- Why are there two websites? https://common-lisp.net%C2%A0and%C2%A0https://lisp-lang.org/
These represent different ways of supporting the CL user base and infrastructure.
3- Is Clojure an enhanced version of the CL?
No. Clojure differs on a few key points; it has a different architecture.
4- What is the updated version of CL?
CL.
Regards,
Phil