That sounds like an ecological disaster. I love trains and sail boats and mass transport that don’t run on fossil fuels, but we also can’t overlook the ecological implications of building ideas like yours. We’ve fucked enough of marine, coastal and soon, deep sea / sea floor ecosystems already.

Tech bros see dystopian sci-fi as inspiration it seems

The dystopia that’s unfolding is like bad writing and not something any self-respecting writer will put to paper