The moat
Local two-sided network effects, brand as the default ride, and some switching costs via wallets and subscriptions. Networks are city-by-city, not global in a single leap — which is why Lyft still exists.
Pain, risk, or retraining required to leave.
The product gets better as more people use it.
Patents, data, licenses, process knowledge, regulation.
Fixed costs spread over a volume rivals cannot match.
Structural ability to be the low-cost producer.
Pricing power from trust, habit, or identity.