The maybe next best thing would be [1] https://interlisp.org/ https://interlisp.org/ & [2] https://github.com/Interlisp https://github.com/Interlisp This 'al

The maybe next best thing would be [1] https://interlisp.org/ https://interlisp.org/ & [2] https://github.com/Interlisp https://github.com/Interlisp This 'also ran', but with much less hype. And because the stars aligned right, the full source is out in the open, without any legal hurdles.