I know at one time I had like 10 pair, half of them brand new. Having dealt with plantar fasciitis - I have finicky feet and finding a comfortable pair of golf shoes that are totally waterproof was never easy for me. So when I did find a pair that I liked, I bought an extra pair because it was difficult to locate them.
When I think of all the money I spent on golf shoes alone over the span of 25 years.... Still have some from 5 years ago, Footjoys, that have never been out of the box.