The idea is that it isn't profitable to focus on building out a network of renewable energy supply when you'll take a short-medium term loss on shutting down wh

The idea is that it isn't profitable to focus on building out a network of renewable energy supply when you'll take a short-medium term loss on shutting down what it is replacing. Regarding storage, that doesn't entirely come into play until the big power plants are scaled down enough that your total available supply is less than the usage, which is not the case on most places most of the time. The risk is that you try to rely on renewables when renewable energy supply is at a minimum and load is at a high, and it exceeds your margin. That's when you need to tap into stored energy. Again, you can usually plan against that.