It’s a cool idea, but has not worked well in practice. The plant referenced in the 2016 article you linked (Crescent Dunes) stopped operation in 2019 due to performance and cost issues. It appears to have restarted after the original owner filed for bankruptcy and sold the asset, but at a lower capacity.

https://en.m.wikipedia.org/wiki/Crescent_Dunes_Solar_Energy_Project

It looks like it regularly goes on sale that cheap on Amazon, at least in my region:

https://camelcamelcamel.com/product/B0BVFS94J5

I guess Freud was right