[eugmill]

I use it as well but it moves far fewer people at a much higher running cost. I love the ferry but it's not a viable replacement.

[ricardoreis]

No one would consider suggesting it as a "replacement" for surface transport.

However, it is a valuable augment to the surface system. The point is that it helps "connect the dots" (providing more options for people to get from A to B) - hence making the system more effective as a whole.