We still have way to little solar in general. We also don't have huge areas were we want to just put solar panels.
At least I thought or still think that in countries like Germany it makes total sense, even in the very long run, to keep solar locally on your roof.
Also those panels don't loose there value just because they are 20 years old. They will produce less but they will be paid of at that time. So why would I abandone them at all?
It would only make sense if suddenly energy overall becomes totally cheap from your proposed solar farms.
But that would I Claude not only energy like power but also heating.
As soon as energy hits rock bottom my assumption is that heating will be the last big energy consumer.
Hospitals are not just any business and if it starts to hurt us as a society we need to interven.