This "exchange" is the undergraduate while "overflow" is the graduate level may because of the idea for Math vs MathOverflow and Physics vs PhysicsOverflow (not SE related) leaking into other domains. While I don't believe that that naming distinction needs to be fixed (nor can we do anything about it), being able to more promptly close (and delete) the debugging and blatantly off topic questions with a minimum of additional community moderation needed. —
MichaelT Sep 20 at 19:59