I do.
6ml ones built for something apparently called an ePower battery. Best things I've ever used, by far. I've tried every variation and, for me.and my wife, these are our favorites. Since we started with these, well over a year ago, I bought and sold Phinacs, Big Daddy's, DCCT's, Vivi's plus a bunch of other stuff that I can't even recall right now.
We never empty them and they never die. A few of my wife's have been in rotation for over a year. I also have a couple of Tatroe
tanks, that I use here and there, but the big cartos remain my GoTo vape. Fill 'em and go. No muss, no fuss, no fiddle and no piddle.
I don't think they're producing them any longer though, but I've purchased enough to last us a few years, and that might be a conservative effort.
So, yeah - someone still uses cartomizers. And that someone would (happily) be me. Oh yeah, and my wife. I almost forgot about her.