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Do electric car motors make use of this property too? I know some cars, such as Porches use higher voltage to enable faster charging.

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Yes, but not just electric cars. Theres a push to move the entire electrical system of all cars from 12V to 48V to reduce the amount of low gauge wiring in a vehicle

Which is why trucks already have 24v as otherwise they would need too much wire.

Boats are also making that move. 24V is pretty common now with newer boats, and with electric propulsion 48V is quite attractive.

The NMEA2000 standard is confined to 12V however, meaning that all boats still need a 12V system as well. Maybe just with DC-DC conversion, or maybe with also a backup battery.

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