It's way better to ride an ebike to the commuter rail station than a tesla to work. Build excellent bike networks for the suburbs. It's as cheap as sidewalk and/or paint.
I want to know AnthonyMouse's response to your argument: the treshold density in walking distance versus the treshold density in cycling distance will scale quadratically with the distance (since area is quadratic function of the radius), an electric bike that extends your range twice, will result in a 4 times higher "effective population density" for public transport to make sense.
Edit: just adding that any environmentally responsible form of personal transport doubles range, also results in quadratically (so four times) fewer stations and stops to be built, and linearly (so only half) the total length of rail or road to be laid and maintained
> the treshold density in walking distance versus the treshold density in cycling distance will scale quadratically with the distance (since area is quadratic function of the radius), an electric bike that extends your range twice, will result in a 4 times higher "effective population density" for public transport to make sense.
That's exactly the problem you're working against. A bicycle doubles the radius from walking, but a car at 70MPH on the highway multiplies it by 20 or more, so you get hundreds of times the area and consequent sprawl. And ebikes at those speeds are fatally dangerous, so they can't be a replacement.
The thing that can actually be competitive is trains that can go as fast as cars, but then you need the density to fill them.
