Maybe those that are getting new ones earlier have had issues and want to start with a new slate. Other line of thinking is that some people just like to have new rigs and can afford to do that or they just owe more than most owners. I usually keep things for quite a while as you can see by me still having a 2000 F350 SuperDuty. Our 3160 will probably stay with us for quite a while also unless we find something we just can't live without.
I am sure salesman would like us to trade up each and every year.
Tom Marty
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