Solar and wind cannot provide base load,
Actually thy can, or more precisely they do.
Base load plants get powered down when wind and solar surges, because you still need the relatively fast demand following mid range and peak plants.
As soon as Germany is with wind power on perhaps 40% level Germany will outphase all old base load plants. Actually we are already in the process doing so.
I have no idea why this idiotic mantra is constantly repeated on /. "X is not base load" ...
So in terms of what we have, there are really three sources of power that can provide, in reality, base load for a billion people today in the world. Coal, natural gas, and nuclear.
Which of those three would you prefer to have, if they are your only choices?
They are not he only choices, for base load I use the cheapest energy I have, regardless if dispatch able or not :D as I said above, it is a misconception especially repeated here on /. that wind and solar are "not base load".