As Berlin's only airport, people are obviously flying out of it. But huge portions of the airport are very obviously unfinished.

What surprised me, given it's meant to be a shopping heaven, is how few food shops there are. At BER to get food we had to queue for a long time because every single food shop (there were only ~4-~5) had giant queues and there were nowhere near enough seats. Large areas remained panelled off. It seems like they struggled to get enough shops. The food places that did exist were real basic e.g. one was a currywurst shop.