Really!? Why? Just curios, as I am contemplating the opposite direction (i.e., from a full-frame Canon to m4/3).
For lack of a better term, not as much 'headroom', a term usually applied to autio recordings.
FAR more flexibility in how I can work the files.
I'd still love to play around with the GH5 and good Oly PanLeica glass, since it's a totally new sensor, but it costs more than my D750!