Up until that point, we could theoretically have cancelled the whole thing.
Now we can't, no matter how bad it gets. Leaving the EU doesn't come with a rewind button.
This is what we lost in the blink of an eye...
Those that complain about Remainers failing to "get behind Brexit" are missing the point.
Brexiters have never made a proper case for what happens beyond the "leave the EU" moment. But it's all the rest that determines our future.