Do you see a lot of people wearing suits outside very traditional, conservative settings? I can't remember the last time I wore one casually. I don't think most people even own their own suits these days, they just rent them for special occasions. We also have the problem of the anchor generation. I'm pretty sure most of us would be fine abandoning suits altogether, but the boomers have lived so long and held on to cultural relevance far longer than any generation in history which has slowed the progress of the Overton window.