Is this normal or are we just darned Lucky?

I bought a new 2003 Jayco 27BH and kept it for 13 years. It was towed thousands of miles for camping trips, got used for kids' sleepovers, my daughter even lived in it for a summer while attending college. Always stored outside. Other than normal PM, and a couple of minor wear and tear items, and a set of tires, it had one small window leak that I caught before any damage was done. Oh, and the power tongue jack died after 12 years of faithful service.