The one thing that pisses me off about US airports relative to European airports

Old, excessive infrastructure.<br><br>So many US airports were constructed in the 1960s and 70s. They dont have the modern conveniences of European airports that were constructed in the 90s and 2000s.<br><br>US airports are constantly trying to jam modern airport technology into the old infrastructure I.e. self scan and bag drop but its just so... dumb.<br><br>The infrastructure is outdated and in desperate need of replacement.<br><br>And it can't be particularly expensive to knock down a couple concourses and replace them with a modern one.<br><br>EDIT: Thanks for the gold!