A micro bag is just a bag charm. I hate carrying a second bag to fit all the things that might not fit in my handbag (unless it's a laptop/documents, or gym kit, which are obviously different use cases). It feels inefficient and poorly organised to carry a handbag that can't even fit the basics. The only mini H bag I have is the Verrou in my profile pic, and even though I love the style and the colour, there is a reason it is actually my least used H bag.
UO - because I can never imagine needing to carry so little that it would fit in a mini bag, I feel like a mini bag signals dependence on others to carry things. I hate feeling dependent on others. On the plus side though, it would rule out DH and sons asking me to carry all their stuff for them, so maybe I shouldn't be so quick to condemn!
I see H bags quite rarely in Melbourne, and then usually in the vicinity of a boutique.