If you are skeptical about the eco system that drove down the cost of semiconductors, computers, cell phones, cameras, and robotics. In the 1950’s the cost of long distance calls was very expensive, today that cost is zero. It is too cheap to bill. The to develop film is now also zero. The same eco system of a large market, capital investment funds for R & D and engineering (with simulation, computer aided design, AI…smart and trained engineers…) will continuously improve price and performance of clean energy faster then the pace of semiconductor improvement in the last 50 years.