I bought the R mainly as a B-cam for video production use and I'm still getting accustomed to it's many quirks. It's great in a lot of ways but one thing that really doesn't work is the two step mode, then info button press, to change between stills and video. I've missed so many shots fumbling around with this, so bring back the switch please although I agree, I don't see it on any of images of the R5, anyone know where it is?
Essentially, the R does a lot of things right but I'm afraid it fails in one key respect and that's terrible rolling shutter. A lot of my work is handheld and the jello, even with well stabilised lenses, renders 4k on this camera almost useless in many scenarios, so much so that I don't even bother using it anymore on my paid shoots, it's just too risky. Even on a tripod, subjects like branches moving in frame or an interview subject waving their hands etc, can turn the image into a liquid, wobbling mess. It shouldn't really have been released in this state to be honest, the sensor is just not up to it, so my concern with the R5 is purely to do with the speed of the sensor and processor and wether it can give us basic 4K video that is useable in real world shooting scenarios even at 25fps.
Oh and while I'm on my moan marathon, Canon stop it with the caveats. The Eos R menu continuously gives you disclaimers like the small print at the end of a commercial. If you do this, you will loose this, You can use this lens but uh oh, now you can't do this. Warning: shooting in this mode is subject to the following side effects. Always read the label before pressing record. There are regularly more greyed out items in the video menu than hairs on my weary head. So please canon just get the basics right with the R5 and I can go back to working with your awesome cameras rather than fighting them.