> As soon as there's an economically profitable way to store 120 hours of regional electricity usage, most utilities will jump towards that over continuing to buy expensive fuel for their current baseload plants.

You store excess energy in the form of hydrogen from electrolysis for that need. Rapid reductions in cost is making this inevitable. You can even convert existing natural gas plants to run on it. It is far and away the simplest and smartest solution for this problem.

IMO, this is the next intellectual showdown between people who have recognized the rapidly dropping cost of green energy technologies and its naysayers. We went through multiple years of what was basically outright denial over the cost of wind and solar. Even after they become cost-effective, certain people still denied it. Hydrogen is in the same boat. It is already at the point where it is competitive, and is only held back by people in outright denial.