I’ve been thinking about trying to get through the SICP again, this time well-armed with a better idea of what the SICP is meant to accomplish, and being older and wiser than my first attempt back in university. I’ve been told by old hands that the MIT Scheme is the only scheme I should think about using, and that other schemes lack features that make the SICP harder to accomplish. “There’s a reason all the ‘SICP-in-X’ end with chapter 3. Other languages can’t support what’s in chapter 4.”