The YC playbook is about having a 6 month monopoly on a corner of PMF.

But you can't get network effects to boot up in 6 days.

Humans just don't go that fast, and that's the fundamental clock speed of network effects.

Code used to be created by humans, so the cost to create was in equilibrium with the cost to adopt.

But now code can be created 10x faster, and it can run faster than humans can adopt.