Re: Would you ignore the referendum?
"Just wait a few more years for the older generation to move on to the sunlit uplands in the sky then have another referendum."
While I agree with your general point that a referendum is a snapshot in time I do object to the casual ageism and, in particular, the idea that it was the "older generation" as some sort of homogenous group who voted leave. I'm one of that older generation and most certainly did not vote leave.
I doubt very much that rejoining will be that feasible. I remember the long drawn-out process of negotiating membership in the first place and can't believe that, having left, it wouldn't be even more difficult the second time around nor that any deal which could be achieved would be as advantageous as what we had.
It was unbelievably stupid to take a slim majority on an advisory referendum as being a fiat. And AFAIK all those who did so are younger than me.