At What Age Does THIS Happen?

Baggy capris that hit just above the ankle.  White tennis shoes.  Tapered choppy haircut.  Seems to be the uniform of every woman I know who's above age 48. 
At age 35, I find myself starting to look at some of my clothes and wonder, "is this too young for me?" Although it's depressing to be at an age where I now have to consider this, what's even more depressing is the thought of getting rid of my coveted (and expensive) clothes.  I definitely would not want to be seen wearing something that is too young for me though.  I like the words of Stacy London, fashion guru formerly of the show "What Not To Wear".  She says- don't look at getting rid of clothes that no longer suit you as a bad thing, look at it as- you're evolving!  And who wouldn't want to evolve?  (except those 50's styles get a pass in my book- gosh I love the classiness that was back then).
I mean, why WOULDN'T you want to look your best everyday?  Why throw on a menswear sack of a t shirt, sweats, and gymshoes when it's just as easy to put on a fitted top, slim jeans and cute ballet flats or boots?  And a little makeup goes a long way.  My routine takes me 5 minutes but it's the difference between looking unnoticed to great and maybe noticed in my opinion.  And when you look your best you feel your best!  That's why I refuse to put a price tag on highlighting my hair or cute clothes! Feeling good is priceless and if I can help it along with artificial means, why not?