As a sorta informed outsider, conceptually this makes intuitive sense. But in practice, how does this work? It seems a lot of the intuition breaks down if we don't assume it's network (aka 1 vendor). Fundamentally it's a bunch of external actors where we cannot verify trust and in order to solve for the needs of the individual, suboptimal choices must be made. To put it another way, even if computers can drive cars, what _else_ needs to be in place for this vision?