if you need it/it has a purpose in your life(eg cleaning cloths, loo brush) then you keep it as it is bringing joy into your life (or not having it would bring less joy, as you'd not have a tool you needed).
But, when it comes to replacing said item, take time to choose one that does make you happy, different type, colour, whatever.
Similarly with clothes, if you hate everything you own, you can't just dump the lot (you could I suppose, but you'd be cold/get arrested) BUT, when you buy new clothes, make sure they do bring joy. So gradually your wardrobe transforms.
As an aside, I think on one of the early MK threads in Housekeeping, a Japanese-speaking MNer reckoned that "bringing joy" wasn't necessarily the best translation, and it was something a lot less "out there", although i can't remember exactly what it was. A much lower bar anyway 