[baranul]

Good points made. When looking at this, it occurred to me that It could have another goal, which is surviving a nuclear war or some other land based catastrophe. Definitely they are no where near to that being possible at the moment, but give it another 20 years, maybe this will be among someone's or an organization's calculations.

[bruce511]

We are so far away from living independently underwater that I'd say we're hundreds of years away, if it's possible at all.

Energy production. Food, water, air. Resources. Mining. Industry. The harsh environment (salt water, fouling et al.) Even "gravity" (as in, if you drop something underwater, some of it goes up ...)