Sail versus power?

There are some online discussions of this but the topic is fairly complex and seems to turn on the assumptions that go into the examples. The sailboat I chose has a small diesel engine and most sailboats of liveabord size have some kind of engine.

In an emergency which is likely to be available to you: wind or fuel? If resources are being commandered, hoarded, or fought over, which is more likely to be available?

My choice is go with the combination.

If you are thinking about cruising, the cost per mile advantage shifts pretty dramatically to sail.