In all reality, /a/ did not choose to split on its own.
Moot did it.
It was during the eternal party of 4chan.
Moot hated /a/. It had wronged him. He wanted to post about anime and /a/ had publicly humiliated him. So he waited, waited for the perfect time.
During the party, Moot came up to /a/, who was in a drunken buzz.
"Come with me, /a/! You are the best board here and i have something i need you to see."
"What is it?" replied /a/.
"I have recently acquired a cask from the fbi. It is said to have the best lolitillado, and i need an experienced expert such as yourself to determine the quality of this lolitillado."
"LOLITILLADO?!" slurred /a/, in his drunken state he could not believe his luck. "OF COURSE ILL FOLLOW YOU!"
so down they go, through the spiral staircase, away from the party. /a/'s cough started to act up, as he's always next to his computer, he has no tolerance of exercise.
blah blah chained to the wall blah blah moot builds a wall of mods, blah blah the party left behind is /jp/