After having not owned a .380 for more than 25 years (briefly owned a Beretta M84 back then), I now own a pair of LCP's. Why?
Plain & simple. Because they fit in some of my shorter and tighter pockets (holstered) that won't hold one of my 5-shot J's.
Why the LCP's?
Simple. They're the smallest of the really big name maker offerings. The S&W Bodyguard (now M&P) .380 was a just enough larger not to interest me, and I didn't want a laser built integral in the frame, anyway.
I picked up the second LCP to have a newer version with a stainless slide, as well as the improved trigger and sights.
Both of mine have run well with an assortment of good quality factory JHP's, although each needed a touch of bright nail polish to let me pick up the sides a bit faster and more clearly. The older version has what might be charitably described as rudimentary sights.
The newer stainless model still benefited from a couple dabs of nail polish (front & rear), but it's quite shootable at the usual distances where I have to qualify and like to run drills, which means from 3-15yds. I find shooting my assortment of J's to be easier out at 25-50yds, but some of that probably has to do with the familiarity of using revolvers at those distances over the years, versus the itty bitty plastic .380s without a lot of grip frame to fill the hand.
To be fair, some of the really diminutive .380's can often seem to be tool small for people with large hands to handle and manipulate. Having thumbs that rub against the slide can interfere with slide run & velocity, which can cause feeding stoppages and other issues, too.
The littlest and lightest of the new .380's are more difficult for some folks to shoot, as well. The larger of the newer offerings, like the LC380 & G42, seem to be liked by a lot of folks, especially female shooters. That's fine.
Personally, I'd not ever again have an interest in owning another 'belt gun' size .380 pistol. Not with the subcompact & compact 9's I own and carry. That's just me, though. Some folks like and enjoy the larger .380's, and find them quite handy for their needs.
Suit yourself.