In most implementations neither Python nor JS (except perhaps partially in Safari) is up to the task of even running the code of SICP properly, due to not having things like TCO.
So the code for versions of the book written using those languages would need to be restructured, losing a big chunk of elegance and possibly destroying the actual lessons about how to express oneself as a computer programmer.
So the code for versions of the book written using those languages would need to be restructured, losing a big chunk of elegance and possibly destroying the actual lessons about how to express oneself as a computer programmer.