[onion2k]

But there is a user lock in. After a while users won't switch. No matter the difference.

Users will switch if someone raises billions and spends that money subsidising rides for users and increasing the revenue for drivers. It's exactly the same model that Uber used to compete with taxis, and it works.

If Uber proves there's a huge market for their product then people will compete with them. This will happen whether or not there are humans or machines driving the cars.