> How much do materials like these depreciate over 20 years? I'd guess in REAL terms not even 50%. Historically (since 1975) metals have appreciated about 5x a

> How much do materials like these depreciate over 20 years? I'd guess in REAL terms not even 50%. Historically (since 1975) metals have appreciated about 5x after inflation. Here is the 50 year price of scrap steel futures: https://www.investing.com/commodities/steel-scrap-historical-data https://www.investing.com/commodities/steel-scrap-historical... Stuff like composites for the turbine blades don't have a clear recycling/resale story yet, although there have be recent attempts to grind them down and turn them into other useful things: https://cen.acs.org/environment/recycling/companies-recycle-wind-turbine-blades/100/i27#:~:text=Fluffy%20fiberglass%20(left)%20recovered%20from,%2C%20and%20sporting%2Dgoods%20industries https://cen.acs.org/environment/recycling/companies-recycle-....