My first impression was the same. Mostly from the screenshots, each one had multiple places with an "emacs" text element. If this is not bound to emacs, what the hell is the emacs thing doing there?
(which can be written in other editors: https://lispcookbook.github.io/cl-cookbook/editor-support.ht... vim, VSCode with LSP support, Jetbrains, Atom/Pulsar, Sublime, Jupyter notebook…) (just saying to not scare people. Emacs is still the best for CL IMO)
Please, netizen, educate yourself. Common Lisp is written in many places outside of Emacs.
If you want to wear your underwear as a hat, that's your own business. Don't blame Common Lisp, or the array of editors which have nice support for it.