Let's hope and light a candle, that you are right on this one.
All the points I've read about being important issues over the last few days have been potentially tricky questions about what happens if A does something it's said it won't, but if it were to, and B decides to be bloody-minded about it, which it probably wouldn't be.
They're all good questions, but I'd have thought there must be a form of words for "we'll let our successors worry about that if and when it ever happens, which it probably won't because people won't want to risk it" they could adopt. Both sides must prefer that to a no-deal Brexit at this point, I'd think.
We'll know for sure soon enough, though maybe not tomorrow.
I'm haunted by the fact, though, that WWI started by accident, more or less, or at least no one expected it to happen until suddenly it did.