Europe still has many megawatts of solar with inverters that disconnect when detecting any grid disruption. This is the absolute worst thing to do when there is a shortage of power - you immediately make the shortage worse and more grid disconnects. The real fix is a grid with second by second pricing based on system frequency, and every individual user allowed to set a daily 'spend cap' of euros/dollars, letting the…
Let's skip the technical problems in your theory and focus on the social.
People need power to survive. You know, food, hot water, light, work, internet, mobile phones, entertainment, etc. This requires stability, not second by second pricing.
When you put a chicken in an oven, you want to cook that chicken and eat it, feed your family. Electricity price rising in the next few minutes would mean that you either have to risk disease (chicken staying in the dangerous temperatures until the electricity price drops) or being hungry and throwing food away. This is not how you want society to function.