Deep statement. Made me think about how to differentiate btw the two. Are there any natural exponential growth at all? Because at least every closed system will

Deep statement. Made me think about how to differentiate btw the two. Are there any natural exponential growth at all? Because at least every closed system will reach a limit at a point. Of course the initial burst could be exponential but the core question is about whether there is an upper limit or a convergence against a constant limit.