Fifth-Wheel Longevity?

We have kept our last two trailers 10 and 11 years and a few of our first ones were a couple of years each. That said we have changed each time because of the way we camp or travel has changed not because any of the units we had fell apart or became unusable. As an example our last change was from a 36 foot 4 slide fifth wheel to a large Truck camper with three slides. The reason for the change was we are now both retired and wanted something easier and smaller to travel and see the country. The fifth wheel was great for traveling to a destination and staying for two or three weeks it was like your own little condo but we found traveling , setup each day and getting back on the road in the morning was getting to be a chore with a fairly large heavy fifth wheel . I am not saying you can’t travel or camp in any size or style RV we just wanted to downsize after having the Hitchhiker for 11 years which was built for and had a warranty for full time use however we were out most years 6-7 months.
You will probably find that your needs change after you have been at for a few years . Good luck with your adventures !