mac , my 2 cents is you would get VERY similar life expectancy = 7+ years , and IF driving habits has ANYTHING to do with that - it's YOU ,your the same guy ,oughtta see similar results , and TPMS SHOULD only (i'm guessing) get BETTER lifespan cause Lith.?(Di-Lithium crystals Captain?) batteries are getting better. My apples to your oranges , I had 2008 van sold in 2016 TPMS good 8+ yrs , 2010 car TPMS going strong still today!
Subjectively speaking I would take lightly a TPMS going out ,especially if it was a 4-way system & not "Illumination upon any" .Also sounds like, hard tires? ,you DO keep'em long. I have this yardstick though - IF 'n you make $$ 75k+ / yr CAPTAIN - maybe CHEAP NOT TO