Johns opinions are well known. The expectations that the huge new factories built or being build now for Solid state batteries bring down battery cost is a lot like Fords mass production of the Model a over a century ago?  
Goodmans Sach are not quacks? Try 2025 perhaps?  
Electric vehicle battery prices are falling faster than expected
A breif cut "
Battery pack prices are now expected to fall by an average of 11% per year from 2023 to 2030, writes Nikhil Bhandari, co-head of Goldman Sachs Research’s Asia-Pacific Natural Resources and Clean Energy Research, in the team’s report."
Its not my research of course. A Company I hold some shares in is  
Quantumscape. It is in the about to add a huge supply line in 2025. I might be wrong of course. John on the other hand might be [bigwhistle][bigwhistle][bigwhistle]