Interesting. I'm definitely looking forward to electric buses and trucks though. Standing on the sidewalk when a bus accelerates next to you can be offensively loud.
I also don't feel like electric cars are more loud, at least at moderate speeds. I always had the impression that they're a lot more silent inside cities. Maybe on a highway that would be different, I can't say.
The biggest offenders of background noise are obviously trucks though.
You aren't wrong.