I have become "reasonably obsessed" with smartphone photography. Instead of carrying a heavy DSLR  my iPhone has become my photographic scrapbook. The limitations are actually its strength: no retouching, not even incremental rotation. Just a quick colour grading and that's all there is too it. My only regret is that it is not really suitable for portrait, unless you already belong to the social group you are capturing, but that's another story.