I don't think you even need to outlaw them. Just add aggressively progressive taxes on externalities, like Norway does (not for noise, but CO2 and NoX emissions

I don't think you even need to outlaw them. Just add aggressively progressive taxes on externalities, like Norway does (not for noise, but CO2 and NoX emissions as well as curbe weight; adding noise as well shouldn't might be an idea). Of course you can regulate thresholds that can not be exceeded as well, but generally I think we should tax externalities more rather than outlaw things whenever possible, and do it much more often. Amp those taxes until the perceived problem goes away, whether because sufficient numbers of people won't pay them or because they're high enough to mitigate the negative effects. When it comes to supercars, I suspect most of them will end up not being on the road much as the proportion of EV cars gets to a point where it starts to reduce the density of places to fill the tank anyway so to the extent they're a problem it will increasingly limit itself and so it's not really worth wasting time on.