These are, in my opinion, the most common cancers in the lives of pianos. But if cost is no issue, you'll probably be better off getting a new one. Modern pianos built by robots are usually quite uniform. With so many moving parts, uniformity and precision is important. But even if the craftspeople from yesteryear made a fine instrument, there is the problem of age itself.
Pianos are machines.
Unlike people, machines never get better with age. I guess so. You know, I've changed my mind about these digital devices. Until very recently I felt it was really a goofy idea to add an electronic gadget to a traditional piano. After all, electronics seem to be changing every Wednesday.