The form factor of a motorbike has been around and more affordable than a car for a century now. I don't think it's the type of engine that makes the majority of people in the developed world prefer to spend substantially more money on vehicles which are considerably more stable and crash resistant, enclosed from the weather and with room for passengers and cargo. If they get e-bikes, they tend to get them as well which might reduce electricity use but requires even more batteries.
And I say that as someone that's managed 18 years of adult life without owning a car or motorised bike living in a country with one of the densest (but still entirely unsuitable for most long distance journeys) rail networks around...
And I say that as someone that's managed 18 years of adult life without owning a car or motorised bike living in a country with one of the densest (but still entirely unsuitable for most long distance journeys) rail networks around...