> Wind energy kills a mere 100 people or so per trillion kWhrs, the majority from falls during maintenance activities

https://www.forbes.com/sites/jamesconca/2013/09/29/forget-ea...

France has had a tidal generator for 50 years, where have you been? I do recognize that model is limited, and other sites are few and fraught with the same issues as dams: natural flow is better for the ecosystem in those locations.

https://en.m.wikipedia.org/wiki/Rance_Tidal_Power_Station

Also [citations needed].

For what it is worth the cost of solar is dropping - and pretty steadily at that, if I recall correctly.

Japan has researched and is working on developing tidal energy [0]. But that's the only case I know of off-hand even related to tidal energy at all... and it hasn't been built yet.

[0] http://www.hydroworld.com/articles/2014/12/japan-develops-ti...