That's a shame because the theoretical grounding that comes from SICP is enough of a clue to tell you why black box library X is crashing, runs too slow, lacks

That's a shame because the theoretical grounding that comes from SICP is enough of a clue to tell you why black box library X is crashing, runs too slow, lacks feature Y, etc. and maybe even enough of a clue to help you modify/hack it to get feature Z as a workaround.