Tulip-bulb, gold rush, hockeystick optimism when reality moves more like bounded diff equ's with a carrying capacity or an impulsive arc overshooting sustainabi

Tulip-bulb, gold rush, hockeystick optimism when reality moves more like bounded diff equ's with a carrying capacity or an impulsive arc overshooting sustainability, not Malthusian exponentials forever on magic rainbows.