Well, I have not went through all the videos. But just looking at some of the examples the digital shutter is not quite as good as the A1. But more significant that I would have thought.

There are other things like the buffer not being as good and not uploading as fast. Somewhat less important, but still definitely gives the 1Dx III some advantages making it still worthwhile.

Makes me now really need to see the IQ, because if it is say only modestly better. The RF mount might be the biggest reason to switch.

Still trying to sort all the specs in my mind and how it all fits. It seems like to me at the moment it wipes the floor in most ways, arguably the most important ways. But in certain ways Canon still left room for the 1Dx III to still be relevant. Sort of.