Not the worst idea
I am still open to something that is subdued but distinctive, but vintage engine sounds would be a reasonable solution, and since in most areas the ICE transition is going to take years, we will be hearing plenty of them anyway.
You might also be able to lower the volume slightly when the ambient sound is lower, and crank it up when it is being drowned out by traffic noise. Either way, I think it is stupid to set this in stone while we haven't seen what works well yet. Only what doesn't,like a silent e-bike tyre jammed into a pedestrian's crack while the walk down the sidewalk.
Biting the hand that feeds IT
