Congratulations! ECL is very mature, and this release seems to further solidify that aspect of the project. We've been using it heavily at our startup with no problems, embedded with c++. I think it's a very well done implementation.
If you're thinking of trying ECL out but emacs/slime is too much to have to learn, rlwrap, is a readline wrapper that makes the REPL very friendly. To integrate with c++, the ECL manual [1] is a decent reference.<p>[1] <a href="https://common-lisp.net/project/ecl/manual/" rel="nofollow">https://common-lisp.net/project/ecl/manual/</a>