[frereubu]

I'm not as sure as you about the result, but I do agree that the campaigning would be absolutely awful to go through, and would reopen a lot of really deep wounds on all sides. It's all very well saying you'd like to rejoin when someone asks you on the street, but an entirely different thing if there was a months-long campaign to have to get through.

[rtkwe]

Not even that but one of the major issues with the first referendum was that Brexit was ill defined so the pro camp was able to promise basically anything as the final status and everyone had a different idea of what the actual outcome would be. Any vote without the actual final deal on the table or at least a guarantee that the final deal will get a vote will kind of inevitably lead to the same "wait I voted for that?!" that happened when the Real Brexit (tm) finally came out.

I'm almost certain that the final Brexit would not have been approved and pretty equally certain people would be vastly unhappy with the requirement to rejoin.