That is true for this report, based on the methodology

https://www.un.org/development/desa/pd/sites/www.un.org.deve...

However, instead of an arbitrary administrative definition, they used an arbitrary cutoff for population density.

Thus it still comes down to a subjective drawing of lines around the city.

The problem is still unfolding. The debt overhang still exists from the housing bubble and is dragging on the economy.

It’s a problem that hasn’t been solved yet.

I always find discussion of the world biggest city a bit of a pointless exercise considering it’s entirely dependent on how administrative lines are drawn.

Highly fragmented metro areas are regarded as smaller than consolidated metro areas, whereas they might be the same size overall.

The correct answer is - all the designs so far aren’t great.

The military would love a smart gun to cut down on accidental discharges. Cops would love it to stop weapons being used against cops.

The issue is that it has to have a very high reliability (you don’t want it to fail to fire while a suspect is shooting at you). And not much point if it only works “sometimes” with unauthorized users.

We know large companies have volume efficiency, so it’s not a realistic scenario.