No, things that aren't yet determined how or if they are going to "work" are those relating to shipment of food and medicine. There is a very high risk of short-term chaos. Considering that in 2018 there were a few days without fresh food simply because of two feet of snow, people are really underestimating the potential risks here.
In case this ever happens - it won't - this will be attributed to the EU pumping billions into Poland's budget every year. Net benefit to Poland is higher than the UK's yearly contribution to the EU budget nowadays.
EU GDP: $19.2T UK GDP: $2.6T
English speaking being the only real differentiator here and probably the most critical reason. However that only goes so far. And what for sure has changed is that we're down from 20+ currencies before to one huge single market with mostly the same currency.
How that all factors in is impossible to say, but to argue that nothing has/will change seems equally unrealistic as the over-the top reporting of the media suggesting the UK banking sector will collapse. Things will go on, but my bet would be there will be a considerable hit.