Nobody buys a 600bhp car to have itself throttle its performance. Well nobody with half a brain which says a lot about Tesla sales.

As far as acceleration is concerned most drivers who care about performance don't really care about 0-60 these days. It's about 70-120 and how they perform at the upper end. Single gear EVe suck at anything above those speeds. Only the high end models are fast enough to hide it.

Also acceleration isn't power limited. It's traction. It's not gear shift or power that keeps everything with normal sized tires at about 2.5.

A second or third gear in sport cars will be a thing. There are plenty of valid use cases once you make it past, "this is a boring commute appliance".