Fast response battery systems largely solve the frequency issue. Unfortunately there is a lot of incentive to put solar on the grid by individual players, while

Fast response battery systems largely solve the frequency issue. Unfortunately there is a lot of incentive to put solar on the grid by individual players, while the cost to do the frequency response is collectivized so tends to lag behind what is needed. Bit surprised countries aren't just legislating this away. For every MW you put on the grid that doesn't have rotational inertia you need to contribute X money to a fund that builds stabilization capacity.