So far it seems to me that only Panasonic and Canon support ProRes RAW correctly.I currently own an EOS R and a GH5. I will sell my GH5 to get a camera that supports ProRes RAW. I would love that camera to be the R6 but seems likes Canon won’t be adding it to the R6. The R5 is out of my budget, if the A74 supports ProRes RAW I’m in, if not, I’m upgrading to the GH5S or GH6. I still prefer my Canom EOS R for photography though.
Everyone else has oversampled, binned, or line skipped RAW which is RAW in name only.
I am not sure there is much advantage over ProRes at that point.