The major drawback for the solar plant is over night storage. That isn't a surprise to anyone. Night time demand has never been the same as daytime demand. The real savings is in the amount it costs to produce each kilowatt hour of power. There is no reason why we shouldn't take advantage of that savings while we can and rely on gas fired power for the rest.
Peak power usage is just after the rush hour when everyone gets home and eats dinner. That is normally well after it gets dark. Also, heating needs are greater at night than during the day, for obvious reasons. When the capital costs of solar are 14 times greater than for natural gas, the chances that you can make it up on the fuel are zero.
The eco-freaks want to totally eliminate the use of fossil fuels. What this analysis shows is that their goal is a pipe dream.
Nobody wants to eliminate fossil fuels immediately. Everybody knows the transition will take time, but only idiots pretend that isn't the case.
You can't ever replace them 100% with solar. That's what the analysis shows. The time required for the transition is eternity. Solar will never be anything more than a boutique source of power.
You could never replace horses with cars until technology was developed to make that possible. Do you think there will never be any advances in technology?