Who would think there are an infinite supply of 32 bit integers?
Allow me to re-phrase: Who woulda’ thunk that we couldn’t just add more internet addresses as needed? I mean, certainly Internet addresses are easier to create than say something like oil right? All you do is add a few more bits, right? If you’d have bet the inventor of the Internet (Al Gore or that other guy) back in the mid-90s that we’d run out of Internet addresses before we ran out of oil, what kind of odds do you think you would have gotten?