The thing that annoys me is that compounding (of interest, or economic growth) is order-dependent: given an average but unequal rate of either, you always maxim

The thing that annoys me is that compounding (of interest, or economic growth) is order-dependent: given an average but unequal rate of either, you always maximise the outcome by placing the higher values earlier, and the smaller values later, so that the low rates (of interest, or of economic growth) compound upon what is already a maximally expanded base. So speaking of averages is actually rather misleading.