Difficulties with filling the tank all the way up

MopaR&D said

I'm too young to know, how did the gas pumps work back in the day so this didn't happen?

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Older pumps pumped with less pressure, and the dispense tube on the pump handle was larger to more closely match the filler tube.

I hold the pump handle upside down with today's pumps and listen for the sound to change and can hear when the gas is coming up the filler tube.