Why I still prefer Instagram to Flickr

It’s all about mobile.

Christa Mrgan:

Flickr’s loss of momentum coincided with the rise of the iPhone, and Flickr’s long-running failure to make a great mobile app contributed to the slow and quiet exodus of many longtime users…just as the best camera is the one you have with you, the best photo-sharing app is the one that’s the easiest and most fun to use on your phone.