Slowing down is the answer for noise and safety, save speed for track days < totally agree with that, and we also need more race tracks again.
People who race and do track days often drive like old grannies because they understand the dangers (especially from head on traffic) far better than the average street driver.
I think it inevitable that hybrids and EVs have some sort of noise projection at manufacture by law soon. Audio senses are 360 degree, vision isn't.
this is probably bad but I find driving extremely boring and I don’t hear or pay attention to any noise outside the car when I drive. I can remember only two drives in the last 10 years when I was not distracting myself with an audiobook or podcast. If an ambulance has their siren on I will notice it, thats it.