Sure. No solution is one size fits all. This particular solar installation happens to be in Colorado, very close to a lot of area where pumped hydro would be extremely cost effective.

Somewhere like Kansas, wind power and battery based storage may be more effective.

Here's a map of pumped storage hydro potential; note how dense the potential is throughout most of the Western US. https://maps.nrel.gov/psh

I know "Kansas is flat" is a popular trope, but it's not even that accurate.

Depending on how you measure, lots of states are flatter than Kansas. Florida is the flattest state by nearly all measures. Illinois is crazy flat as well.