I guess many of this site have been participating in the sci.math newsgroup. This question/discussion specifically addresses those people which had experience with sci.math. I did not do any statistics but I could imagine that the number of users (articles per day) in sci.math is decreasing while this site obviously attracts more and more people.
What kind of features of SE made you change to this site (perhaps after having used sci.math for years)?
Is there something which was better in sci.math and which you are missing here?
Are you still participating in sci.math?
I am interested in your answers and remarks...