There is a US DOE report on the forecast for charging, that's pretty well done. The conclusion is that the number and availability and capability of charging is projected to basically grow very rapidly over the next 20 years, basically orders of magnitude. The problem is that the projected wait time for car charging is expected to remain flat or even get worse, because the popularity of EVs will continue to grow, basically in lockstep with the available charging infrastructure. So if you are looking forward to seeing lots more chargers, you are in luck because they are coming in a big way. The bad news is if you think charging availability sucks now, it's probably going to keep sucking about the same because the new EVs are going to soak up the capacity.