There is a sense of disbelief about the new trade problems between Great Britain and the EU / Northern Ireland. Which we need to lose. This is the new normal. And we face a difficult period of adjustment - immediate paperwork needs, and to longer term uncompetitiveness.
As we trade folk might have mentioned before, outside of the single market and the customs union of the EU, problems at borders are normal. Delays common. Great job of the Brexit supporters to find supposed experts claiming otherwise, but now back to reality...
Such delays at borders were in fact part of the origin of the single market, in the days when the Conservatives didn't see a contradiction between free markets and sovereignty. Such delays weren't really compatible with a supposed common market. So, the single market...
The delays and individual issues will ebb and flow. There will be new regulatory requirements in EU and UK affecting different products. But for UK and EU business as a whole it will mean UK-EU trade is more costly and less predictable, and there will be economic adjustment.
To put it bluntly, some UK firms will go out of business due to new border barriers. Some EU firms will stop supplying the UK, at a cost increase to UK consumers but a possible new opportunity for firms. This adjustment will take some time though.