So basically, in 40 years time when the majority of people who voted for Brexit will be dead and buried, we will MAYBE SORT OF be able to see if things are KIND OF ok, except totally different anyway... and if things are good, any remaining Brexit voters can say "See! This is cos of Brexit, it was right after all!"... and if things are NOT good they can say "Nothing to do with Brexit, that was decades ago and the world is a totally different place now".