The creatures, great and small, that exist today exist because they, and countless generations before them, each underwent tiny, microscopic changes that made each generation just a little better, stronger and more durable than the last. Each generation was a measured experiment, and every change was measured against the context of its environment. Those that worked were carried through to the following generations. Those that weren’t died out.
The more generations you have, the more opportunities you have to experiment, change and measure.
A horsefly or a flying fox cannot easily control how many generations they can produce in a given time. As a software product designer, though, you can.
Release early, release often. Measure. Repeat.
No animal is alive today that developed all its characteristics within one, three or even 100 generations.