Sure. But the context always starts with the first input, right? And how can you guarantee—or why should you guarantee—that the reply to the first input will always be the same? And if that’s not the case, how can we ensure the preceding context remains consistent?

On the other hand, you might be able to let self driving car take you anywhere instead of asking someone give you a ride.

I seldomly ask others for a ride, I prefer to pay a taxi cab. And no, I would still prefer a taxi driver over an autonomous vehicle even if they were available, because a human is still very much useful when it comes to the last 50 meters of a trip. I often ask for guidance to find the correct entrance, for instance. BTW, your argument is very cheap, I tend to hear it often. "You are afraid of roboters? Here is one, play with it, you will like it!"

People showing up to their destinations dead, having passed away in a self-driving vehicle, is inevitable. May as well make it work on our terms.

It's supposed to be used by people who cannot access financial service. But they still have to buy Libra with their current currencies, and then Facebook becomes that financial service. So Facebook can reach to where those other financial services cannot reach?