Not under powered, nor as powered as I could be.
With most makers producing 9mm versions barely bigger than their 380s it seems pointless to even bother in most cases. But sometimes that tiny bit of size diff is a world of change, depending on your circumstance. It's also a much pricier round.
I mean I've thought about getting a 380 since getting into guns. Almost did several times, but in the end, nothing really seemed to make enough sense.
I hope one day I just get one, just to do it, and force myself to. I think I'll find I like the tiny size diff a bunch. On paper, though, is negligent.