Was assuming it was a backend. I still don't understand the advantage though. It'd help to have an example.
Just finished typing up an example as you wrote this. Rather than duplicate it, here's the link:
I imagine production backend with LLM connected using debug interface and patching the code continuously on any exception encounter.
(not a CL expert here)
Thing is with .NET you can debug a release build, and even do remote debugging... So it's all a weird claim to me. Definitely someone who only uses Common Lisp and maybe a language with a less impressive debugging background wrote this article.
To be fair, I love Lisp, I dont do a lot with it, though I'm mostly a fan of Racket which is the most modern one outside of maybe Clojure.