Actually around 60% of people have off-road parking.

https://www.transportxtra.com/publications/parking-review/news/66621/a-third-of-uk-homeowners-don-t-have-a-driveway-or-garage-to-install-a-home-chargepoint/

1/3 don't, so conversely 2/3 do.

So there is room to rise from about 1% of cars being EVs to 60%, which would take a decade, before this becomes a roadblock. Enough time to install chargers in every lamp post.