would you leave or stay ?

There is a difference between going back and not moving forward. Sure, there's a market for it, and Nexon possibly could open a separate server for an older patch version if they wanted, but that is different from reverting the current servers back.

I don't believe those people are switching back and forth because they are entirely two different experiences, my assumption is not that they want to be stuck in the same 10 patch vortex but rather want to rewind to start over a new game without potential. I don't think players like OP know how to articulate this, but I feel maplestory would be in a much, MUCH better place if they didn't set themselves with such a uncontrolled standard