My uncle has a suit that's about 30 years old. He calls it his "interview suit" because he only wears it to interviews, so it doesn't get much use.
Some of my shirts are over a decade old and I still wear them to work. Especially ones that are solid colors. Can you really tell a simple Arrow or Van Huesen shirt from one a decade ago?
I still own a couple of T-shirts that I won playing video games at an arcade in the 1980s when I was a teenager. If I lose enough weight to fit into those, I've REALLY found the wayback machine!