Output degrades at about ~1% a year. EOL for a solar panel is typically about 30 years. It will still generate power but if it is a commercial operation then it will likely be in consideration for replacement. I imagine there would be a large secondary market in the future for used but still functional solar panels as utilities and smaller solar farms replace the panels and possibly funneling into the residential market.
Perovskite is a family a materials by the way so many of these issues can be sortened out.
I'm overall just skeptic.