As I said in the same post, it is my experience that they do degrade regardless. I have not seen enough example that regular use or "proper maintenance" actually do anything significant. For my own equipment, I do not exercise it (basically a charge and discharge cycling) hoping it will lengthen their life.

Electrolytic capacitor is made of thin aluminum foil and wet paper. It's not sealed completely either. They do dry up eventually. There is a process to "form" this layer and rejuvenate capacitors by ramping up voltage slowly. It does seem to help ones that aren't completely dead yet. Even then, I do not consider these units reliable enough. I would want to replace defective components or buy a new one.

They do last 10 years or longer unless they are severely under rated or defective. Most of them last much longer. Personally, (and I'm not rich) after that, I'm not worried about them much. I consider them "well served".