I was only 21 years old when I starting teaching high school students so I bought some very nice tailored suits that first year out of college. Well those suits are long gone. As I got older (24- 25) I worked mostly in elementary schools where a more casual washable wardrobe was practical and appropriate. Once I opened my own studio the washable wardrobe was still my day-to-day wear. However there were conventions & meetings where I needed a suit now and then.
These days, sad to say, it seems the time that I am most likely to pull out a suit when I need to attend a memorial service.