OP, as you see by the responses, battery life can vary from a few years to over 10.
Guess what that makes the average?
You’re getting into the average.
On a scale of good to worst conditions (all other things equal) it goes moderate temps = longest battery life. Cold conditions = not as good. Hot weather = shortest life.
You’ve asked a crystal ball question that is frankly pretty silly. Given you have a high $ truck that is a garage queen, I’ll presume you’re an older person. As such you probably have your own years of experience with car batteries and this vehicle or it’s batteries are not any more special than any others.
So bottom line, flip a coin.