I think it’s not so much what’s appropriate for one’s age, but what’s appropriate for the venue.
If a dresser's goal is to go out, their best bet is to dress in a way that’ll be in line with what other folks are wearing. Once that’s achieved, the question is: does it look good or not? If those two requirements aren’t fulfilled, lack of age appropriateness is just compounding a bigger problem.
Of course, what folks wear at home when they’re alone or in the company of consenting partners is their business.
