There's some good news on that side of things.
The Bank of England has reduced it's worst case scenario in the event of a no deal exit (something like a 6-8% hit to the economy) by around 2%.
So they see the worst case as a recession. Something that usually happens every 5-10 years anyway.
For me, that reduces the economic downside considerably while leaving in place the long term flexibility of being outside a tariff wall that guards a sluggish economic system.
Whether we get a no deal brexit is anyone's guess. But if the choice is remain or leave - well, we had that vote.