Tesla opening its exclusive Superchargers to rivals leaves some owners worried about waiting in line behind Fords and Kias

• Tesla plans to open 3,500 of its fast-charging plugs to owners of any car by the end of 2024. 
• The reliable and extensive Supercharger network used to be only for Tesla owners. 
• Some Tesla owners worry the move could lead to long waits at charging stations. 

For Nelson Jackson, a big reason for buying a Tesla Model S was the company's extensive charging network, which takes some of the headaches out of being an early electric-vehicle adopter.