Long story short, Luuv tried to do away with the Babbling/IB dichotomy and instead we have FFA, which is the light stuff across the spectrum, and Rants, which is the heavy stuff.
But there is a third Noise board, made in a fit of long-subsided drama, called Dumpster Fires. It's hidden from the public and unlocks when you hit a certain post count. The premise was that some drama was just never going to end so might as well move the threads there where no one has to see them.
Only problem was that at some point, thread-making permissions were turned on in DF and many of the most unseemly characters claimed the folder as their own and it's been four years of being unable to evict them.