It looks as if the EU’s Shengen days are numbered. 
Thank goodness, I hear you say. Sanity returns.
But be careful what you wish for. I remember well the queues of stinking lorries at border crossings, waiting interminably for the cynical attention of the customs crews, who now and then threw a sickie or struck in the name of solidarity with something or other. Train drivers, air-traffic controllers, farmers…..
And if you were unlucky enough to be carrying goods requiring their attention, it was ‘back of the line for you, my lad, car or no car’. I have spent whole half-days between Belgium and France, Holland and Germany. Friday afternoons in summer were always particularly unpleasant among short-tempered drivers eager to get home and short-tempered customs officers reluctant to let them.
Ho hum.