Reply #21: That is a graph of "variablity" not "reliability",

[kristopher]

What happens when, as demonstrated by this thread, a utility is suddenly and unexpectedly faced with the loss of 1,000,000,000 watts of power that they are counting on? What are the consequences to the design of the infrastructure for accommodating that not-so-rare problem? That is a problem with "reliability".

In contrast, even though solar and wind are more "variable" we have a great deal of understanding about impending changes in their output and we can plan the inputs to deal with it in exactly the same way we deal with the variability in deamdn.