Well said, no argument please

- we all know each other's views already.
The main issue with hydroelectric is that is is not a generation source when it comes to rapid response to demand peaks, it's storage via pumped storage. Depending on the design capacity and level of utilisation, it can be depleted in minutes, and can take hours to be reestablished to a useful level, and as such, is typically used for demand surges such as advert breaks in popular TV programmes rather than general daytime demand being greater than nighttime.
The reason the Mayans died out has nothing to do with what they did and everything to do with invasion

- on the other hand, I agree about keeping obsolete methods running when we have extant technologies to replace them, but equally, some newer ones are ubeconomical and should not be seriously considered as a solution other than in extreme specific cases - they work in sites where conditions are perfect, but not in every random convenient place, even if some companies do place them there simply to gather subsidy funds to the point that numerous wind turbines are run at a loss and their operators profit entirely from subsidies, while the energy fed into the national grid is sold at a loss due to costs involved. Eliminating useless subsidies and placebo methods is just as important as reducing coal/oil dependence.