[skitout]

Security wise, a much more decentralize system have some big advantages...

Yes managing intermittence have a cost, but battery is not the only solution out there.

A good diversified / complementary mix of source of energy reduce the level of the intermittence. Aside of thermal powerplant, some hydropower and biomass can be very flexible for example.

Solar and wind are so cheap now, that it make sense to build more than we need at peak, giving some extra buffer.

You can work on the demand side of electricity. Lowering the peak or making demand more flexible for example.

On the electricity storage, stationary batteries make sometime sense... EV can also play a role. There are also other solution like pumped hydro.

And thermal storage have a huge potential - and it is relatively cheap