1: Battery swapping needs *extensive infrastructure* country wide ( if we limit ourselves to India), which in turn requires a rock solid b-plan as well as a quite substantial capital investment. Moreover to keep the batteries fully charged, the swapping station requires same power and time as the charging stations.
Whereas charging stations require less planning and investment as they are very similar to diesel or petrol refilling stations. So effectively the set up of swapping stations will cost more than that of charging stations.