Also, because there are fewer opportunities to wear wafuku on a regular basis except for summer festivals and other events where one would intentionally wear yukata, it's no longer being considered even as informal wear largely by young women with comparatively frequent chances to wear yukata, among others.
むしろ、夏の祭りなどの行事に浴衣をわざわざ着て行く以外に、習慣として和服を着る機会が少なくなっている現在、浴衣の着る機会の多い若い女性を中心に、浴衣は略装であるという感覚も失われつつある。