I find myself wondering what exactly "move on" is meant to mean in this situation? Because, absent the shuffling of a few bits of legalities and paperwork, nothing has fundamentally changed. Brexit, contrary to the fondest beliefs of its supporters, is not some kind of instant liberation, but the beginning of a process...a process which, many predict, may well result in significant, and possibly negative, economic and social consequences. That problem will remain after Brexit Day just as much as it did before. People saying "and this is exactly the consequence we were warning of" is not remoaners not moving on, it's people who were able to look past the fantastical promises of the Leave tendency to the real, practical problems.
And, of course, in this fool's paradise and hall of mirrors, any such comment, no matter how legitimate, will be turned around and used to explain why the almost-inevitable negative consequences of Brexit start to manifest are somehow because not enough people had faith in the whole business, and all those remoaners are why it's not going so well. Let's face it, that process started when the first Brexit supporter jeered "We won. Get over it" on the day after the referendum.