Where to start with mummy2017's comments?
At one stage, I worked for the Inland Revenue. I think I was pretty good at my job. We had shelves full of books to tell us how to work out tax. We didn't have shelves full of books on how to negotiate trade deals. No doubt some skills would have been transferable, but it would have been a steep learning curve, and not one accomplished in 12 months.
Yes, 'it will work out in the end'. Will it? Cast your mind back to your history lessons. Did the Irish potato famine work out well? For some individuals forced to emigrate who then did well, then yes. For others, who starved to death, no. It caused huge depopulation which has taken decades if not a century to recover from. Cast your mind back further - where now are the Roman, Spanish, Austo-Hungarian and Ottoman Empires? All lasted a few hundred years - all overreached themselves or were destroyed by war.
Some people recovered after the 1990s bust. Others didn't. If you have a business and it goes down the pan, it's one thing to start again in your thirties, not so easy to do at 60.
As has been said, what about the RoI/NI border? I don't see any constructive plans there yet. This is something which makes me angry - the Good Friday Agreement was hard won, and to be in danger of squandering it, appalls me.