At the time it was really frustrating to hear people say "64 bits is just twice as big as it is now, that will never last" and I would say emphatically "No, that is FOUR BILLION times bigger!" and get hit with "Well what if every light switch in the world had its own IP address huh? huh?" and I would say "Yup, if that happened we MIGHT use up may 10 or 16 BILLIONTHS of the address space just for lights, the equivalent impact of dedicating a class B in the current address space to lights, which nobody would really think twice about."

Alas, such discussions were not compelling.