XL was basically an experiment on a 2.1 architecture with some tweaks but at a larger image size... hence the XL but it wasn't really an evolution of the underl

XL was basically an experiment on a 2.1 architecture with some tweaks but at a larger image size... hence the XL but it wasn't really an evolution of the underlying architecture which is why it wasn't 3.0 or even 2.5 it was "bigger" lol