Two fundamental shapes: logarithmic and exponential.
Logarithmic: starts off quickly, but then hits a ceiling it never surpasses even with infinite effort.
Exponential: starts off slowly (compared to logarithmic), but then self-accelerates to infinity.
Logarithmic systems are closed systems.
Exponential systems are open-ended systems.
When you focus on quick returns, you will pick the logarithmic.
When you focus on a longer time horizon, you'll pick the exponential.