Personally, i don't see the need for a mini auto. In any caliber.
I felt the same way for decades, and carried model 36's and a Charter arms 44spcl for a long time. But my mini auto's hide out in a jeans pocket - front or back - far better than a 2 inch 38 or similar. And that is the 'problem' as I see it, for the Model 42 Glock. It is very phat and sharp and bulky for pocket carry, and if one is going to holster carry anyway, no reason not to go with a 9x19 etc.