It was an interesting topic for this High Growth Board but the thread got sidetracked so let me try again…
Growth is the result of fast adoption and low cost. Simplicity drives adoption, complexity kills it. The SaaS business model provides the service and hides the complexity, if any exists. Because SaaS is mostly software it is low cost. If you pay for the brains with stock options it becomes (apparently) even cheaper. If you produce enough cash to buy back shares you get growth on steroids.
In modern economics it’s called “Increasing Returns” the more you sell the more you sell.