Also blimps are genuinely useful. Like how else could you float in place in the air long term? Helicopters will run out of fuel. Planes can't be motionless like that. It's just that we are very fossil fuel coded so we use helicopters for everything and shrug at the fuel use. Is it used for mass passenger movement? No. But weather balloons are kind of the same thing for example. The tech does still get used. Just not exactly as a blimp/zeppelin. Using them as motherships for drone swarms is something that's been explored recently I think.
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