To expand, the only fluid that needs replacing is the washer fluid. There is no oil needed EVs, and most don't have transmissions, they are direct drive from the motors. The oil in the motor doesn't need to be changed because it's a sealed system.

So that leaves brakes, which aren't used nearly as much due to regenerative braking like you said. And of course tires because that's just normal wear from use. And the cabin air filter every couple years.

EVs have less than half the parts of an ICE vehicle simply because most of the engine and transmission components just aren't there. There is simply less there that can break or wear out.

Battery longevity will depend largely on the battery tech and quality the manufacturer uses, and how good their Battery Management System is. Batteries wear mostly due to high use and how you manage charging. Fast charging all the time will wear them faster than charging overnight at home for instance. I keep my Model 3 battery between 60-80% charge and that's way more than I need for daily driving. When going on a trip I fully charge the night before and there are a ton of chargers on all the long distance trips I've made. It reroutes to account for busy chargers automatically and I rarely need to think about it.