Dimension fields limited to 2 per axis

Are dimension fields intended to be limited to a max of 2 per axis, or in a table's case 2 in rows or 2 in columns? Because it won't let me add more than 2 into each without removing one of the already existing ones. In older versions, like all the way back to 1.x seems to allow it though. It is just something that would be nice for some of my use cases and while I could convert the fields to measures I guess, that isn't what they really are and is also tedious.