Is this a bad thing?
The affected parties can work out new rules for trade, travel, and drivers' licenses one at a time, can they not?
Could they not fall back to the rules that were in place before Britain joined the EU?
Is the dreaded "No Deal Brexit" much ado about nothing? Why the hysteria about deals on so many fronts with so many issues when they can be worked out in an orderly manner in due time?
There are lots of businesses and individuals who travel to and do business in the EU every day. Do they just shut down or stay home waiting for "due time" to pass?
It's exactly this economy-killing uncertainty that the article is talking about.