131 karma · joined September 19, 2022
That would be a boring one, actually. Most implementations stick to the standard (and for good), only adding features clearly missing from the standard. And these features are also quite community-approved, with something like Trivial Gray Streams, Bordeaux Threads and other portability libraries being de-facto standard libraries working on almost all implementations.
One exception to this would be Allegro CL. It has such a huge ecosystem that one can easily lock themselves in there and write the kind of Allegro Lisp dialect. But that's rather and exception than the rule.
Also note that 430 lines is the code compliant with our bd.style: heavily commented, unambiguous, modifyable. You can always minify the code and it'll be some 1K commands, which is pretty small for a text editor.