What I meant was, is there a reason to keep it low beyond "bigger isn't necessary"? Like a performance reason for instance, or an address is like a URL so shorter is easier to remember, or something like that.
The reason I ask is if there's a good reason that a bigger address space would be worse in some way, then "bigger isn't necessary" might be a decent argument, but if there's no good reason not to make it bigger, then it's not such a good argument.
