Meanwhile the US only increased capacity in pumped hydroelectric by 2.1 Gw between 2010-2022 for a whopping 22 Gw total capacity. Hydroelectric generally hovers about 28% of total renewable energy electricity generation.

The biggest problem (in the US) has been a lack of investment in new pumped hydroelectric projects not connected to improving existing dam infrastructure. Permitting huge new projects but smaller is unattractive unless it is geographically/geologically favorable like with most of the new sites being planned in California and Arizona.

For those wondering about the energy, not just the power:

When fully charged, the upper reservoir can store enough energy to power the plant at full capacity for 10.8 hours, equivalent to nearly 40 GWh.