I’ll gladly pay the extra money to not have parts fail at wildly inconvenient places and times, be it on the side of the interstate far from a trusted mechanic or high on an alpine shelf road, where a recovery may cost $2,000+
Pushing 280,000 miles on a 90,000 mile part that is integral to the vehicle’s function and where failure comes at great risk for catastrophic engine damage for a savings of $1300 or 8 hours of your time and a whole lot of cussing is not a reasonably proportional tradeoff. It is a rubber belt, afterall.