I've tried to stay out of this, because there is no way I can avoid not getting somewhat political.
This is just a guess, based on my own experiences of living in many different houses in my lifetime, as well as helping others work on their homes. The majority of homes have 100-amp services and are likely not suitable candidates for installing high current electric vehicle chargers. There are still homes out there that have only 60-amp services. Upgrading these homes require completely new services, including the wiring from the utility's transformers to their meters. For most homeowners this will be somewhat expensive, especially if they live in a neighborhood that has all underground services. Even for those who are not electricians, but have the knowledge and skills, this can be difficult, requiring building plans and permits. Utilities will not connect to a new service until they have been inspected.
It appears that now that we have a need for more electricity, that is not powered by fossil fuel, that nuclear fusion powered plants are getting closer to reality. So, I don't think that power supply is going to be an issue but transporting that extra power, especially through established neighborhoods and commercial districts, may require expensive infrastructure upgrades.
As a transportation professional I have attended many meetings with politicians and appointees. There are politicians and officials out there that believe we should all ride on public transportation, and automobiles should only be available for those providing critical services (like politicians and government officials).
Even very successful transit routes typically carry less than 10% of the people travelling along those routes. 6% is actually considered pretty good. 2 or 3% is more common. It can be difficult even getting the ridership information from transit agencies, they like to say how many people they transported over a given length of time to make them look good, and don't say what percentage of the people travelling in the area they actually carry.
We all know that the supply of oil is finite and will run out someday. Therefore, we all know that some other manner of propulsion is necessary. It's just that I have a problem with powering electric cars with lithium batteries. There are restrictions on transporting lithium batteries, especially in airplanes, but somehow it's OK to transport a large multi-cell battery pack underneath of us in electric powered cars?
My final thought on this, new roadway construction and roadway maintenance are mostly paid for through taxes paid on fuel. Electric vehicles don't pay fuel taxes, so how will we build and maintain roads? The most logical method would be a mileage-based user fee based on vehicle type/weight with GPS collected data. New vehicles could report this data based only on miles travelled. It's bad enough that Google tracks our every move, without having the government knowing, also.
How to Stop Google and Other Services From Tracking Your Location | NDTV Gadgets 360