From my experience scaling to a 100 is also pretty easy. You don't get consistent results across all your teams but you're small enough to mask this with direct communication and adhoc process. The foundational stuff really pays off when you go to 200, 300 plus, and you will definitely slow down.

We intentionally focused the article on 1 to 100. Today we are over 400 engineers and we are still pretty happy with how the engineering velocity progressed as the team grew.