IIRC, Stallman's original mission was to write a 'free' operating system (-> GNU Hurd). For that he needed a C compiler, an editor, a Lisp, etc.
Integrating GNU Emacs into proprietary operating systems like Microsoft DOS / Windows or Apple's MacOS wasn't his priority.
There were a bunch of other Lisps on DOS/Windows: Xlisp, MuLisp, CLISP, EcoLisp, RefLisp, LinkLisp, Corman Lisp, Golden Common Lisp, Procyon Common Lisp, Allegro CL, Medley, LispWorks (later), NanoLisp, Software Engineer, Star Sapphire Common Lisp, ...
Maybe they were too late, didn't fit your requirements, etc. But it was not that there was none.
IIRC, Stallman's original mission was to write a 'free' operating system (-> GNU Hurd). For that he needed a C compiler, an editor, a Lisp, etc.
Integrating GNU Emacs into proprietary operating systems like Microsoft DOS / Windows or Apple's MacOS wasn't his priority.
There were a bunch of other Lisps on DOS/Windows: Xlisp, MuLisp, CLISP, EcoLisp, RefLisp, LinkLisp, Corman Lisp, Golden Common Lisp, Procyon Common Lisp, Allegro CL, Medley, LispWorks (later), NanoLisp, Software Engineer, Star Sapphire Common Lisp, ...
Maybe they were too late, didn't fit your requirements, etc. But it was not that there was none.