How many copies of X-Plane 10 have been sold so far?

There's a considerable lack of LIT night textures for taller buildings, which makes landing approaches very dangerous on big cities. Are they going to be released? When?

One area while not so important does add a great deal to the overall feeling of being there is "ambient sounds". For eg; are we near a busy road? Lets hear the traffic. Does a goods train rumble past the airport? Lets hear the train. Near some trees and bushes then lets hear the birds. Near water then how about some water bird sounds and/or frogs etc;.

 

I remember many happy hours making airports with Flight Unlimited and all of this was possble.