As stated above, as long as you understand the limitations of both the round and delivery system and practice enough to become proficient, the .380 will do what it does. I carry a P32 in 7.65mm (.32 ACP); I am under no illusion that it will make my target burst into flames or dematerialize, but I practice with it, understand its weaknesses and strengths and I am confident I could defend myself well with it. Also, these guns allow one to always maintain Rule #1 of gunfighting - have a gun.
"Don't pick a fight with an old man. If he's too old to fight, he'll just kill you."