I know a lot of people want to have a baby Browning in 9mm, however more and more I think a caliber should only be shrunk down to a certain level of size of the gun.
Many, if not most, of the micro 9mms and .380s I have seen have reliability or durability issues, or both. I have met one reliable Ruger LCP as an example, and only two reliable Kel Tecs, both of which are .32s. Of the micro 9mms I have owned or tested, the samples of one Kel Tec PF9 and Ruger copy did not run worth a damn, and only one of the three PM9s I have owned is remotely reliable, and it only with limited and specific JHP ammo.
Size up the Kahrs just a bit to the P or CW9 size and they become much more reliable, in my experience.
The G42 sized .380 should be very shootable, flat, concealable, easy to handle, and in that size envelope easy to make both reliable and durable. A very modern version of the early 1900s Colt, Savage and Remington "pocket" guns (back when guys like Bogart had big pockets).
Now if Glock would make a no BS reliable and durable .40 that runs 100% with full power ammo with a light mounted, then they would be "cooking with gas" as my dad used to say.