Comment by mschuster91

> We have video games like Fortnite that can handle collision detection across a hundred players with bullets flying everywhere.

With Fortnite, Epic pushes one update and a week later virtually every gamer has the update for free. And when an update goes bad, or the game goes down, usually nobody dies.

With aviation? Lifecycles there are measured in decades, and the changes needed for new control systems in an existing aircraft can be so huge that the entire aircraft needs a new certification. Hell if you want and can acquire such a thing, you can fly aircraft that's over a century old. Many avionics systems still in use today fundamentally date back to shortly after WW2 - VOR/DME for example is 1950s technology.

For tower control systems, you'd need a system that's capable of dealing with very very old aircraft, military aircraft that doesn't even have transponders activated a lot of the time, aircraft that don't have transponders at all (e.g. ultralights), has well defined interfaces with other systems (regional/national/continental/oceanic control zones)...

Oh and someone has to pay for all of that.