Technological Progress Happens via Simulated Annealing

Once you get to that final minimum, where you can only iterate to improve, people see it as the every-day, and start latching onto a new round of fluid creation (and there's the fight-The-Man attitude, too).

I'll call the growth-after-optimum a "flowering" period, where things shoot off in all directions. Frequently, they're based on that optimum, but not always (seeds spread).

(and how exactly is the Windows / Command key a major innovation? there have been function keys longer than there have been computer keyboards)

The post also makes you realise that marketing and evangelizing is a very important aspect of doing a startup, especially if your product is groundbreaking and threatening to the status qou.