Average life is 8 years ???
Heck mine is over 24 and other than the pressure tank rupturing* (replaced with fiberglass one ) and the occasional pressure switch I'm still going strong.
*The metal tank made rust which abated the bladder and caused leaks and the glass tank cured that problem. (so far, I think. Makes sense)
I'll add that the pressure switch is a routine maintenance item as the contact points do need occasional polishing as they do get pitted.
Either polish or replace from time to time. (LOL, I do have a spare set on hand)
Think older cars and replacement of the distributer points as well as sand blasting the spark plugs.