I thought all mainstream EVs were liquid-cooled? I'm sure the motor and battery still need cooling, though perhaps less than exploding dino juice engines. If this weren't true, Tesla wouldn't sell branded jugs of coolant ;-)
The cooling system in an EV are much, much smaller. You're looking at maybe about 20kW for a Tesla Model 3 with 450hp motors, and this includes heat rejection from the air conditioner.
(on the other hand, the air conditioner on EVs is a _critical_ component, because the main battery can't tolerate being heated to more than +90C like regular ICE engines)
However, it seems reasonable once you think about it.
The mechanical power of a car is about 25-30% of the total heat generated. So a 150hp car actually generates about 450hp of heat energy. Most of that power is indeed lost in exhaust. The 1/3 of 150hp is 50hp, around 10% of the total.
(2013 leaf, btw. very basic. just kinda works.)
They have a lot of power and because you don't have to bring an engine up to RPM and shift, and bring up to RPM, and shift.. and on..
That power is also instantaneous. However far down I push on the pedal, I'm at that speed basically right away.
Another huge thing, is that they are quiet. There is still a bit of road noise from wind and the physical contact of the wheels with the road. But compared with almost any typical car, its basically silent.
Also, they don't stink. You might not notice it, but your car smells. It gets on you and the people around you. My car doesn't smell like gas or exhaust or anything.
Oh and not to mention, basically nothing ever goes wrong. There is so much less to go wrong on an EV. We don't have a bunch of coolant and pumps sloshing around effectively trying to cool a giant, shaking, moving lump of iron. With out all that rattling, things just don't need as much maintenence.