Are mini and micro bags actually practical or just cute accessories?

Are mini and micro bags actually practical or just cute accessories?

What do you guys think about mini / micro bags? The type that fit a mini brush and lip gloss but not your phone?

Examples:
The Chanel mini quilted vanity bag
The Jacquemus le chiquito mini
The Prada mini pouch

I personally find them cute but see them as more of an accessory to an outfit then a bag.

Are mini and micro bags actually practical or just cute accessories?
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