That hasn't made economical sense for most products in quite a while. They still go, because taxes on gas and cigarettes are still lower, and I guess you can still get cheap haircuts.
don't forget the vietnamese markets that sell knock-off products. Plenty of people still buy their "branded" clothing there for a fraction of the price of an original item.
That depends. Most of the people I know (Czechia) go to Germany almost weekly for most of the essential products. Even if some prices might be the same, the quality is on a completely different level.
I see they've lately had some trends around food and architecture, but I assure you that traditionally, yurop is the meme community, where anything goes, while this one is more serious and less appreciative of memes.