Originally Posted by ramdeebam
If you are a winning player, then there is no reason not to add more tables if you can handle it.
I think this is an over-generalization. It's personal / situational, with various possible reasons not to. For instance, the more tables you play, the more ABC your game has to be since you have less time to read opponents as much or as well. This doesn't do much to help prepare you for the times you move up to a new level and find you need to adapt your thinking, your reading and your game because the opponents' tendencies and patterns differ more often from those you're used to.