The "businesses renting out their lots after hours" is an interesting model, though in high-density areas it's not clear that this would be enough, and might no

The "businesses renting out their lots after hours" is an interesting model, though in high-density areas it's not clear that this would be enough, and might not be well co-located with residential demand. City-owned public infrastructure (i.e. lamppost charging) makes a lot of sense too, but infrastructure changes are slow and expensive, and will certainly lag far behind demand. It might be a way for municipalities to earn revenue, though. One could also imagine how much self-driving might help this: The car could pilot itself to a nearby charging station/lot without any inconvenience to the owner. But we are not there yet with capability, so this remains a near-term problem.