Sly is a derivative of Slime. I shy away from derivatives unless I understand exactly why the derivative is better than the original. In my view, derivatives often have poor documentation: they just copy the original docs, and I can’t tell when to do things the original way versus a special derivative way.

Thus I used Debian and not Ubuntu, Vim and not Neovim, Emacs and not Spacemacs (though that’s not exactly a derivative), etc.

I do use SBCL rather than CMUCL, as I do understand why SBCL is better for me: CMUCL won’t run on my platform.

I look at the Sly page and I have no idea why I would want any of the stuff it does, so I stick with Slime.

Maybe TRY USING it and then you might understand. This mindset is the same reason people rarely try lisp because it is quite difficult to see somethings without actually using them.

I don’t have time to try everything. Sly may well be excellent.

Plenty of folks might not try Lisp because they’re happy with the tools they have. And that’s ok.

Eh, I can see a use for stickers, they seem more convenient to work with than (break).

Zulu-Inuoe's jzon blew everything else out of the water imho. It's a superlative example of a robust and comprehensive library to do a single job very well.

New to me! Will give it a bash.

The "cannot encode a dotted pair" issue still being open is the only thing worrying me, personally.