I don't understand how companies can spend precious resources on a brand new caliber that offers nothing over already established calibers while something like .32 NAA, which is an improvement in every way over .380, is totally disregarded.
Had S&W started making guns in .32 NAA and Federal the ammo, there would likely be a lot more interest.
I would like to, at least, see some conversion kits for popular 380's. There are a plethora of 380 Mustang pattern pistols (mine is the Kimber, but, for all intents and purposes, they are all the same. Parts can even be swapped amongst them.) That would be a good place to start with a barrel and spring kit. Then maeby the Glock 42. There are a lot of 380 pistols that should work, but the parts don't exist.