Motivation: Emacs Lisp is not Common Lisp. It's cumbersome using Common Lisp for Emacs package development and cl.el is discouraged. Even not considering that simple fact, how we can use the massive Common Lisp ecosystem in a nice way? Sorry, I don't know how to do that in a simple way. Just no.
Beyond that Lem it is quite fast and there is the OpenGL [1] front as unofficial contribution. It could be embedded as a Lisp IDE inside of a game called Lisp Hacking Experience that was never made.
The amount of good reasons for doing that it can be enumerated by thinking about the common lisp ecosystem as I said earlier.
BTW, emacs is great but it not have good defaults enough for modern Common Lisp development, Lem it's awesome as default for Common Lisp ;). Not having any beginner friendly editor for Common Lisp it was one of the reasons that I teaching Lisp was so difficult.
Edit: Portacle is a good Emacs dist, but it is still emacs, so don't push the discussion with this in mind. It's pointless. And Portacle it's great in your own way (https://portacle.github.io/)
[1] https://github.com/pupcraft/lem-opengl
Beyond that Lem it is quite fast and there is the OpenGL [1] front as unofficial contribution. It could be embedded as a Lisp IDE inside of a game called Lisp Hacking Experience that was never made.
The amount of good reasons for doing that it can be enumerated by thinking about the common lisp ecosystem as I said earlier.
BTW, emacs is great but it not have good defaults enough for modern Common Lisp development, Lem it's awesome as default for Common Lisp ;). Not having any beginner friendly editor for Common Lisp it was one of the reasons that I teaching Lisp was so difficult.
Edit: Portacle is a good Emacs dist, but it is still emacs, so don't push the discussion with this in mind. It's pointless. And Portacle it's great in your own way (https://portacle.github.io/)
[1] https://github.com/pupcraft/lem-opengl