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In my expierence it’s not that significant. Also regen going down hill adds a lot of control, reduces brake wear, and recovers some of the energy spent going up.

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In my experience it has been significant. going up the mountain from the base to crestline takes as much energy as going from riverside orange county (12 miles up a mountain vs ~50 miles on flat land). (both a fiat500e and bolt EUV for reference have about the same efficacy change)

Yeah but then when you go back down you get most of it back.

That's my experience with an EV, the regen is so good I'll gain back significant charge going down a mountain.

Right, but that's true in a combustion vehicle as well, and in the EV you regain energy on the downhill while a combustion vehicle at best continues to consume idle amounts of fuel and wears its brake pads.

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