My final post in 2023 was about growth curves. It focused on the difference between geometric growth versus exponential growth — which turns out to be not much — and compared them to polynomial growth (see that post for the math-y details; this post isn’t a math post, so relax and read on).
A key characteristic of all these growth curves is that they grow without limit. If we treat the horizontal axis as time, then the longer the growth continues along the curve, the greater whatever growing grows.
The problem is that nothing in the real world can grow infinitely without limit. At some point, something has to give.
Consider the lowly 
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