Fun and clever, thank you! I think some more squares in 24D and 38D also take some alternate solutions (and I believe that can be edited post-publish).
An Ephemeral Collation 9:33 · 2024-04-27T19:16:18.277Z
This was very fun to solve save for the section around the SW where I think you intended to implement two other Schrödinger squares (square three of 44-A and square four of 46-A); if not, the clue for 38-D is only correct for the version of the solve featuring the school that comes alphabetically first as the resulting answer (if no other gimmick squares are truly present) is a nation where the clued substance in question is still illegal.