Of course that applies to many other places in Brandenburg with similar distance to Berlin, but the airport means that transportation to and from the city has been (or will be) built out for higher capacity.
Also it has to be close enough to the city to make commuting from the population center reasonable, no?
Also in Bavaria, once you leave Munich (BMW), Augsburg or Ingoldstadt (Audi), there is quite a steep drop-off in density. The traditional high-density industrial regions of Germany are rather in the west and south-west.
That is about as good as it gets.
They probably got the land cheap and commitment to build at another record breaking pace.
I mean we used to build factories on the river for that reason. Made a royal mess, but easy to ship things in and out.