Maybe the US just has just lost its fascination.
I mean, we are bombarded with America's stupidity amost every day, why spend our vacation there? The whole travel experience just sucks anyway and at the border you are treated like the next Osama Bin Laden.
Compare this to travelling inside the EU, where we enjoy complete freedom of travel, good food, nice cities, safety and general rationality.
It's just way more pleasant over here.