I guess the reason there is not too much new CLISP development going on is that it's really a mature product. The ANSI standard of Common Lisp was published in

I guess the reason there is not too much new CLISP development going on is that it's really a mature product. The ANSI standard of Common Lisp was published in 1994 and there was no amendments or additions since then. CLISP has implemented it awhile ago. Also, CLISP is written in C and doesn't compile to machine code like, for example, SBCL, so no need for an extra work to target new platforms. Again, that's my guess.