I think it was mainly a design decision about wanting the game to get harder as you progressed instead of easier. Which I have mixed feelings about because divide and conquer where it starts hard but gets eaaier as you clean up can be very satisfying, but factory games can scale in ways that would make it more trivially boring.
I’ve never understood how destroying nests logically accelerates evolution if none of them survive
This other nests pickup on pheromones that tell them what the others died from.
That or its a hive mind so they learn from each encounter.
I think it was mainly a design decision about wanting the game to get harder as you progressed instead of easier. Which I have mixed feelings about because divide and conquer where it starts hard but gets eaaier as you clean up can be very satisfying, but factory games can scale in ways that would make it more trivially boring.