The illusion of all three being achieved at some point is because they are running at a loss of VC's investment money. Eventually investors will demand profitability, and one of the following happens: fees go up, deliveries get slower, workers become miserable.
This is also what bothers me with this new "hire others to run errands for you" industry. These are things you might find bothersome (go out to buy food, buy groceries, etc), but their perceived value as compared to the things you're buying is so incredibly small, that any "fair" compensation for the person doing it would discourage most people from paying for the service in the first place.
At its core, the amazement of "wow, the delivery of my groceries is so fast and cheap" is not at the shiny technology that makes it possible, but rather the amazement at "wow, there are people willing to do this for such a small amount of money".