It's not that the cars have one pedal, it's that you can get by with one pedal as lifting off the accelerator will induce the regenerative braking and slow the

It's not that the cars have one pedal, it's that you can get by with one pedal as lifting off the accelerator will induce the regenerative braking and slow the car down. On the Tesla at least this is an optional feature since it can be jarring to people who haven't used it.