How does it differ from the default ATC? I know default is lame, but is it a matter of what it tells / directs you is what has already been inputted?
Such as SID / STAR’s, height restrictions, speeds etc?
If there is a runway change, does that make the STAR now obsolete? Since it’s all a 0’s and 1 program, can it now assign new arrivals routes etc?
I’m just curious how it all works.