I used to have a DSLR camera and the pictures I've taken with it are fantastic. But I realized that lugging it around was a chore and whenever I wanted to take a shot in a jiffy, it was never possible for me. With a small kid, it became even more difficult to manage it because now I had a stroller and a diaper bag to carry. Once I forgot my DSLR on a flight in Asia and that was the time I realized I can't be bothered with it anymore. The airline found it and returned it to me. I sold it soon after that along with the lenses, tripod, and the camera bag to a photography student at a steep discount.

Edit: The point is that a smartphone camera may never compete with a DSLR on quality but its portability and convenience are unparalleled.