I'll never understand why people post LLM outputs in forums pretending they wrote it themselves.

You asked Claude or some other agent to make your argument for you, and what you got was a well formatted pile of nothing. Bravo.

> Conversely CL's standard library is indebted to decades of history.

There's no such thing as "CL's standard library." I presume you mean the functions built into Common Lisp which provide basic functionality, but nobody uses "bare" Common Lisp any more than anybody uses bare C. The Quicklisp libraries for CL (among others) provide the modern utilities you seem to think CL lacks.