I'm in two minds about that @MissSmiley and it's something I've been thinking about too.
One idea I had was to keep my "decluttered" clothes in storage and then when a dress or whatever wears through, I choose another dress from there to replace it with. But, I've been really careful choosing things which I can wear to a number of places and in a number of ways, so not sure that will work.
I don't often wear my clothes out completely though tbh, as I am a terrible person and just buy things because they're pretty or fashionable and only wear them for a year or so before they get forgotten about, which is awful, I know.
So I think that having a small and well thought out wardrobe with a strict one in one out (at worst) policy, will still lead to me buying a lot less than normal.
Also, there is something in the theory that the more you have, the more you buy (for me). For example, I will love a pair of jeans in my wardrobe, but will not know how to style them, so I'll look at how they're being styled by fashionable people. I don't have the same things they have so...yes, you guessed. I buy things to go with the things. And on it goes!
I'll also keep buying nearly new off vinted or ebay to replace things which wear out, so not too bad. It's easier to do that when you know exactly what you need and it is only one item.
The big thing I've got rid of is my shoe collection which was huge and my feet aren't up to wearing a lot of them. I will replace my new (orthopedic 😳) shoes with new when they wear through as I am damaging my body with uncomfortable ones. Also, from an environmentalist perspective, if I can't walk in my shoes, I'll choose driving, taxis or public transport which is less eco friendly. So I'll justify it that way!