After the initial gee-whiz, the majority of the gunsumers are realizing that the Micro 9mm pistol are not all that enjoyable to shoot, with the result that they shoot poorly with them - or not at all. I have had many clients - mostly beginners and of all genders - buy the small 9mm pistols because the gun shills on WhoTube told them to, and they develop bad habits and poor shooting ability.
That 9mm ammo is the least expensive CF round you can buy is also an unfortunate fact that leads to bad choices.
There is a size/power ratio of effectiveness with firearms, and in those size guns, .380 is basically Everyman's limit. The uninformed think they want a lipstick-sized .50 BMG, until they have to use it.
PS. CCI Blazer Brass recently introduced a reduced velocity 9mm 100 grain FMJ round, that essentially makes the ubiquitous "Micro 9" closer in recoil and effect to a .380.