Basic flight control is a fixed-sized problem. More military aircraft systems now on what the environment and enemy are doing.

You're just imagining things at this point.

The overwhelming majority of embedded systems are desired around a max buffer size and known worst case execution time. Attempting to balance resources dynamically in a fine grained way is almost always a mistake in these systems.

Putting the words "modern" and "drone" in your sentence doesn't change this.

The compute side of real-time tracking and analysis of entity behavior in the environment is bottlenecked by what the sensors can resolve at this point. On the software side you really can’t flood the zone with enough drones etc such that software can’t keep up.

These systems have limits but they are extremely high and in the improbable scenario that you hit them then it is a priority problem. That design problem has mature solutions from several decades ago when the limits were a few dozen simultaneous tracks.