I've been wondering if there is a download to allow more active runways to help with the backlog of AI traffic held up because other AI planes wont stop landing? It almost became a problem the other day. I was just sitting by the taxiway and watching AI take off and land, but the planes didn't seem to let up on approaches. I had about 5 or 6 planes lined up for take off, but not getting clearence. Even with a large time gap between two of the landers. I had been watching for quite a while and had to quit for other reasons, so I didn't get to find out if the other plane would take off or not.
I remember going through this at busy airports, where there is a long line of planes wanting to take off. But at the airport I watched, it wasn't that busy with ground traffic, and I saw about 10 planes come in with only one taking off. Plus it just add some realism.