In the latest changelog, I noticed the claimed improvements for “Airports with closed runways”
So I tried Berlin Tempelhof (closed for years and turned into a public park)
Here is what it looks like in the game, this screenshot says it all…
Spawn points are fully working, all runways and taxiways are lit even though they have big crosses on them, and ATC will happily direct you and clear you to land on them.
I think the “Closed runways” topic still needs some work.