I expect some existing electronics with delicate timing to be slightly broken (e.g. cracker64's ARAY copy machine misses a few pixels), since they rely on the original slightly glitchy behaviour. But electronics being more predictable will cause fewer problems in the long run. Please test electronic elements thoroughly.

Also, INSL now blocks DLAY conduction, DLAY temperature limit has been raised, and ambient heat no longer goes through walls as much.