The time has finally come for geothermal energy

Base generation was a cost optimization. Planners noticed that load never dropped below a specific level, and that cheapest power was from a plant designed to run 100% of the time rather than one designed to turn on and off frequently. So they could reduce cost by building a mix of base and peaker generation plants.

In 2025, that's no longer the case. The cheapest power is solar & wind, which produces power intermittently. And the next cheapest power is dispatchable.

To take advantage of this cheap intermittent power, we need a way to provide power when the sun isn't shining and the wind isn't blowing. Which is provided by storage and/or peaker plants.

That's what we need. If added non-dispatchable power to that mix than we're displacing cheap solar/wind with more expensive mix, and still not eliminating the need for further storage/peaker plants.

If non-dispatchable power is significantly cheaper than storage and/or peaker power than it's useful in a modern grid. That's not the case in 2025. The next cheapest power is natural gas, and it's dispatchable. If you restrict to clean options, storage & geographical diversity is cheaper than other options. Batteries for short term storage and pumped hydro for long term storage.

You are using long-term in an extremely vague way.

Pumped hydro is not a solution for seasonal storage or yearly storage. Seasonal variation can be a problem in higher latitudes.

For example we have a serious problem in New Zealand where our existing "green" hydro lakes are sometimes low and our economy is affected: creating national power crises during dry years. We use coal-burning Huntley and peakers to somewhat cover occasional low hydro generation.

Unfortunately our existing generators also have regulatory capture, and they prevent generating competition (e.g. new solar farms) through rather dirty tactics (according to the insider I spoke with).

Apparently much of our hydro generation is equivalent to “run-of-river” which requires the river to flow. Although the lakes themselves are large, they don't have enough capacity to cover a dry year.

NZ had planned a pumped hydro, but it was expensive: planned cost of 16 billion compared against total NZ export income of ~100 billion. https://www.rnz.co.nz/news/national/503816/govt-confirms-it-... So completely uneconomic risk (plus other problems like NIMBY).