It's a tool with some embedded kind of Lisp dialect. There are zillions of it.
> why didn't Kaz use SBCL or CLISP?
Why should he? He can do whatever he want. I personally don't care at all about what he does. Why are you? Kind of strange obsession with comp.lang.lisp. Are you one of the trolls posting there?
> They're good enough for c.l.l. kooks like him to recommend to everyone else, but why're they not good enough for him to use?
Probably he did it to annoy real programmers like you?
> why didn't Kaz use SBCL or CLISP?
Why should he? He can do whatever he want. I personally don't care at all about what he does. Why are you? Kind of strange obsession with comp.lang.lisp. Are you one of the trolls posting there?
> They're good enough for c.l.l. kooks like him to recommend to everyone else, but why're they not good enough for him to use?
Probably he did it to annoy real programmers like you?