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Solar panels prices have, for the past several decades, been dropping like a rock while also becoming much highwer quality and higher efficiency. It's only now that they seem to have for the most part leveled off. Now the panels the cheapest part of a solar setup. Batteries, inverters, and charge controllers are the more expensive items.
Well yes, and no.
Over several decades, yes.
Per year it has been a steady ~5% / year (to be fair IDK about like the last some years) since at least the 1970. It does add up! But slowly.
Electronics? Yeah that's a falling rock. Like -50 percent (!) Every 18 months or 2 years.
The difference of "Moore's law" and incremental advances in the rest of the industry really shows off when you compare them side to side.
BTW biotech seems to benefit or run on something like Moore's law. It's very interesting times over there IMO.