I've been exploring CL lately.

- IMO the documentation state is not great, but it's being worked on. (it's said to be non-existent for Haskell :p ) CL has many books to learn from (CL recipes of 2015 being the more interesting to me http://weitz.de/cl-recipes/), but the online documentation is not brilliant. Often the web page isn't attractive at all, not every project provides good documentation, the "official" websites are bad (cliki, others). It's being fixed by https://github.com/CodyReichert/awesome-cl, http://lisp-lang.org/, https://lispcookbook.github.io/cl-cookbook/, http://quickdocs.org/ and http://phoe.tymoon.eu/clus/doku.php

- one can feel the language is dating. It has IMO too many weird semantics: no map and filter but map which takes a second argument telling the type of the structure or mapcar and others, remove-if[-not], etc. Creating hash-tables is too verbose and not consistent, et. That all a lot more are fixed in CL21 http://cl21.org/ (its wiki https://github.com/cl21/cl21/wiki). CL21 also offers more functional-oriented stuff like shorter lambdas, lazy sequences, generic functions, or string interpolation, regexp literals, and more. It's a bit under-documented, but its wiki is ok.

- web dev in CL is another topic. I sugest https://stackoverflow.com/a/42838145/1506338 but what's doable now is very elegant.

- CL has a big ecosystem, we can use Emacs/Vim/Atom, Portacle is straightforward is portable and thus straightforward to use (https://shinmera.github.io/portacle/),…