Service station distance is also a factor of gas supply chains. You need gas trucks to stop at stations every so often. They could be closer together, but that

Service station distance is also a factor of gas supply chains. You need gas trucks to stop at stations every so often. They could be closer together, but that means more truck stops and that means more labor costs, etc. EV charging stations just need an electric grid connection. Some maintenance/labor is still a good idea, but it isn't necessarily the same regularity and overhead costs of a trucking-based supply chain.