Tesla chargers have instantaneous telemetry that tell drivers exactly how many charging stalls are functional. Presumably this information is available to Tesla

Tesla chargers have instantaneous telemetry that tell drivers exactly how many charging stalls are functional. Presumably this information is available to Tesla employees, who seem to take action immediately when a charging station reports trouble. Excluding the entire card payments industry from the process (thus excluding a garbage-fire of non-functional third party technology) takes care of the rest.