We always have plenty of Pläne, the Pläne are not the issue here.

Not on earth, but there are certain orbits of Jupiter where it would work like gangbusters!

There’s also a huge barrier to entry in fossil fuels, since the existing industry owns the oil wells and refineries.

And the patents you need to license to build them.

Of course you could, but the energy math only really makes sense if you scale it up.

Most tidal energy projects involve damming a bay or reservoir and extracting energy with turbines as water flows in or out due to the tides.