I doubt the “average” gets maintenance and many die a death from thousands of ways- transaxle failures, deck damage, repairs are more than it’s worth, etc.It's well known the average gas mower lasts well over 10 years (assuming home use, ~50 hours/year) with minor maintenance. Let's not be silly here.
Yes there are thousands of old CC and Deere gear drive and hydrostats still going but those are the exception.
