I always wondered why people choose to make these "I no longer use X and now I am happier" kind of posts, where X could be a number of things including Twitter, as opposed to quietly fading away. For people who were happy with X, these posts just sound like sour grapes[1].
I am not a top Twitter user by any metric, but I have been happy with the content I got. I wonder if all the problems I hear about are limited to the English speaking parts of Twitter?