We finally know why the Instagram founders really quit

Last year, in an effort to give shape to The Interface’s coverage area, I posted a public list of questions that I hoped to investigate over time. I saved my favorite one for last: why did Kevin Systrom and Mike Krieger really leave Instagram?
In the months since the co-founders abruptly quit, we’ve gotten more details about the split. We learned that increasing tension with Facebook, combined with an unusually long post-acquisition tenure at their acquirer, had made them antsy. But