Hose life....

Well I had a 1971 Saab 99 and the hoses lasted forever. And my '07 5.9L CTD has the original hoses at 185k miles. So there is some variation in quality but they ALL age.

Mine are going to be changed out soon; too many long trips towing to work sites to let it go. Serpentine belt was changed at 100k miles and it was mildly cracked; not bad, but on it's way.