Why do electric cars all seem to be direct-drive from the motor to the wheel? I mean, there might be gears in there, but there isn't really any shifting going on. Wouldn't the car be faster/more thrifty if you could shift into a high gear for cruising and run the motor slower? Perhaps promote motor longevity? And yes a motor has instant torque but different gear ratios still CHANGE the amount of torque being sent to the wheels, right?

I'm imagining an electric motor from a Tesla in a manual Miata hooked up to the stock transmission. It's giving me happy feelings. Imagine the clutch slippage.