Most of the comments here seem to be about suits, except from Alex and a few others. I've noticed some serious roughing-up/pilling on the collars of my dress shirts after just 40 or so washes. Admittedly, none of these are particularly high quality shirts, certainly nothing near what Alex provides. In addition, I have a relatively large neck for my frame, so I use a little metal collar extender. Does that contribute to heavy wear?
Perhaps I could go up a collar size or two but look for slim-fit, so that my shirt don't fit me like a tent.
Life expectancy of John Lobb shoes: 15 years, if properly cared for and resoled when necessary.
Life expectancy of Brioni suits and sportcoats, all with moderate lapels and double vents: 10-12 years, if steamed and brushed regularly and dry cleaning avoided.
Life expectancy of Oxxford suits and sportcoats, all with moderate lapels and double vents: 12-15 years, if steamed and brushed regularly and dry cleaning avoided.
Life expectancy of SoCal's Thom Browne suits, sportcoats, and trousers:
8 months to 1 year, when thom browne's shrunken look falls out of bed and no one wears it any more-- except for Pee Wee Herman re-runs at 2AM.