city driving vs hwy driving has to do a lot with it, mot than how many miles you have on your car. Thas said I have 20k on my mats and there is some ware on the driver side but not too much, did i mention i have a spare set i picked up localy for $40 .
I don't get the concern on the wear on the mats. They're supposed to not last forever and at least it preserves your carpet where it would otherwise be worn without the mats?
Most of us had Montster Mats in our MK4's. They were better made and never had wear issues. My brother has Monster Mats in his 01 Beetle and they still look like new.