I’m prepared for 95+% of my life, but it’s easy for me to wing it for the other 5%. (As a number of people have mentioned, evening formal wear, or daytime dressy weddings might be a stretch with my current closet.) That said, I live/work in a large East coast city, and I’m never sized out of regular retail brands. I have plenty of retail options, and fabulous high-end consignment close by, and if I was truly desperate, I could hop on the train to New York. I used to have many more formal items, but truthfully, my need for cocktail attire or dresses for summer weddings is so limited, that I finally let go of those items, deciding that I’d much rather have something new, should the occasion arise. That said, reading through this string, I think my willingness to “wing it” for a few occasions has a lot to do with the fact that it’s easy for me to shop, and I’m likely to find items that fit at retail. If that weren’t the case, I’d probably keep a few more formal items on hand, “just in case.”