Wind power kills more people per kWh than nuclear does. Hydro power often relies on dams that devastate ecosystems. Solar is expensive as hell. I don't even know about tidal, does anyone even do that?
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.
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.
https://www.forbes.com/sites/jamesconca/2013/09/29/forget-ea...