this will vary a lot by region. some places are more densely populated than others. looking up regional statistics of average trip length and percentiles (like

this will vary a lot by region. some places are more densely populated than others. looking up regional statistics of average trip length and percentiles (like the length of 95% of trips) could give some objective metrics to complement what might be primarily psychological / behavioral hangups I think what would really clinch this is not creating gargantuan batteries but simply making batteries universal plug-n-play. So if needed you just stop a battery station and replace it. This solves also the unfortunate bottleneck of everybody charging their batteries during night-time, which (last time I checked) is when the sun is not shinning...