Hell ...tires on my old wood hauler trailer that ran from the house to the woods 3 mile down the county road lasted 17 years proving.......nothing.
One problem is some of us go my miles of service and others by years of service.
Some may put 10k+ miles a year on the trailers tires and others maybe 1500-1800 miles a year.
Some may make short trips to their favorite camp grounds vs those who run 300-400 miles a day for several days to get at their spots.
Some may have a lightweight trailer while others may have a heavier weight trailer.
Some folks are good at making a morning psi check and thump the tires at each fuel stop each day while others maybe at the start of a trip.
One thing we do know is what will happen with a 10 year old tire on a trailer then make a couple of 600 mile a day run at interstate speeds. Better have a good spare and a quick way to change a shredded tire.