How necessary is a capsule wardrobe for improvement?

Do you think having a capsule wardrobe is crucial or entirely optional when trying to improve your appearance? Does improving mean having a "signature look", or something else? Would you recommend people have one regardless of how necessary it is?
It depends what you're referring to here. If you're talking about interchangeable items for multiple outfits, it's entirely optional. If you're talking about having a capsule wardrobe in the sense of having a closet dedicated to Japanese gacha machine collectibles, that is, in fact, mandatory. It's how you prepare for the end times; as gacha will be our only currency in the wasteland.

Preppers have their doomsday bunkers, normies have a walk in closet filled with Hatsune Miku figurines