Maybe you are just a superior owner and driver than your neighbors. I have acquaintances that will kill anything by their driving habits and philosophy about maintenance.
I do drive mainly highway miles, but my last two Toyotas had/have a total of 335K miles. In that entire time I had never replaced the OEM battery for both (no BS), the original clutch in both, and only went through 1 set of brakes on the older one (current car has orignal brakes at 160K miles).
Combination of good cars, non-abusive conditions, and sensible driving works for me. ;-)