Looks like cost calculations were done with "NREL ATB low"

https://atb.nrel.gov/electricity/2019/changes.html

Example for wind: "The Low cost case was updated to reflect recent bottom-up analysis regarding the potential of R&D to enable significant cost reductions."

So basically we made a model based on vaporware. I am not sure how much I trust the idea that we can mine enough rare earth elements for PV cells to make it cheaper than coal. Not to mention the cost of energy storage needed for renewable sources.

We all want green energy- but I really find it hard to believe the claims made in this report. At least right now.