1. Perception by non-EV buyers that charging is difficult, slow, unavailable, etc. This is what Tesla fought against at the beginning and arguably has one of the best "solutions" for.
2. Actual usage by EV owners; if the first is perception only then this one shouldn't exist much; but if they are complaining, there is a massive real problem that needs to be addressed - otherwise the EV owners will become non-EV owners over time, and it'll be harder to get them to go back.
(If I were a car company wanting to reassure people about the EV issues, I'd have a "bring the car in anytime during the first 5 years and we'll rent you for cheap or free a hybrid for those long trips you're worried about" or similar. The vast majority of vehicle travel can be done with any EV, because they start and end at home and are less than 200 miles.)