This sounds attractive when you have more time than money.

I buy new clothes because I can quickly find a wide selection online, filter through it by size, price, etc, and be done buying a whole new set of clothes (that replace worn-out clothes) in the same 2-3 hours it takes to go to a thrift store or two, and find 1-2 pieces that fit.

I'm fashion-oblivious though; for people who want to look just so this approach would be rather expensive.