I thought solar panels (if still working) will be around 70-80% after 25 years, is that also why people are replacing them? Seems used solar panels could still

I thought solar panels (if still working) will be around 70-80% after 25 years, is that also why people are replacing them? Seems used solar panels could still be used as long as people know its degraded. I have degraded rechargeable batteries, and I keep using them until they die, I just rotate them out to non critical items I dont care about. Also, Those glass panels could be used for items like greenhouses? Building materials? People are building with car tires, should be something you could use non working ones for, or cutting out good cells, etc. Something.