Interesting possibility, to this you add that (likely) young people that became eligible for voting tend to be more pro-EU and anyway go against the status quo,

Interesting possibility, to this you add that (likely) young people that became eligible for voting tend to be more pro-EU and anyway go against the status quo, and the 10 years after vote could be easily reversed. But for getting 60% or more there is anyway the need of lots of people changing their mind. I still believe (maybe wrongly) that part of the reasons why Brexit succeeded was because the voters were not properly told what the advantages and disadvantages could have been, so a certain number of people voted for Brexit without really-really being convinced.