In the real world there is no such thing as having an exponential growth function, they're all really just sigmoidal. The sole question is the latter suspicion:

In the real world there is no such thing as having an exponential growth function, they're all really just sigmoidal. The sole question is the latter suspicion: is the plateau now happening now or coming later? With sigmoidal growth it's near impossible to have clarity on that until after the fact.