I think the model is only really sustainable at "affordable prices" in high density areas. New York is a good example. You can watch videos following e-bike delivery drivers in these high density areas. They're sometimes retrieving and delivering multiple orders within a 15 minute period. Unfortunately New York isn't the greatest example because the high wages are offset by the extreme housing costs. It feels incredibly wasteful to send someone driving around to pick up some tacos, but as long as I can get it fairly cheaply, I'll continue to do it.