There are several implementations of Common Lisp that are still being actively developed. Because Common Lisp is so easily extended, the ossification of the st

There are several implementations of Common Lisp that are still being actively developed. Because Common Lisp is so easily extended, the ossification of the standard is actually a good thing. The stability of the standard means that code written 30 years ago will still work today. Feature updates aren't required, because any desired feature can be implemented in macros and imported as a library.