A fast pace layer can be sublimated into a lower pace layer once the best practices are conclusively discovered.

At that point, no one bothers trying much different at that layer because the best practice is obviously better than whatever they'd build.

It's hard to build a faster pace layer on top of a pace layer that's still swirling and unsettled.

So until the best practices are settled, frozen in place, innovation can't move^[kw] up a layer.^[kx]