Let's not get carried away. It might work as a belt buckle for Andre the Giant, but nobody smaller.
On the other hand, Zoom clearly has a lot of confidence in 32 bit float. If you record in that mode (without parallel 24 or 16 bit fixed recording) YOU CAN'T SET THE TRIM AT ALL. The knobs let you fade the input for L/R mix, but no way to do anything to the ISO tracks in 32 bit float, it's disabled in the menu.
I have run the Mixpre 6 II three times, you can set trim in the menu since the knobs on that machine also do fading. But I have been getting mostly piano recitals to record, setting gain optimally for those in the hall where I record is something I have done hundreds of times, so no real test of the range. I will run the F6 on a piano recital Friday, probably in dual mode so I can use the "right" gain settings, if I feel confident enough I might try it in straight 32 bit float and pray the thing works as well as Zoom thinks it does.
Jeff