Just thinking about that - especially when exporting a vector map to use as displacement in an external 3d program
Would be very useful as an option in the Render node, but also as a selectable option per Render element for the example AC5LT43R mentioned.
Since the elements are grouped under Lighting, Data etc, each group could have a 32bit switch? Then your data render elements could be 32 bit and your color beauty elements 16bit float?