It makes the comparison with an ICE vehicle much more direct. Instead of "cheap car plus expensive fuel" vs. "expensive car plus cheap electricity", it's "car plus fuel" vs. "car plus battery rental".
Also, just thinking about it now, it helps mitigate risk due to fluctuating demand because the cost to own and operate the vehicle scales down more at light usage.
Also, just thinking about it now, it helps mitigate risk due to fluctuating demand because the cost to own and operate the vehicle scales down more at light usage.