I’ve never been a fan of dual media types in a camera, but that’s just an annoyance more than a physical limitation. I seldom shoot any of my cameras RAW+JPEG to both cards, but if that’s something you commonly do, then I can understand why it would be an issue for you. Overall, I think it was a mistake to do that mainly because of the performance limitation it imposes as well as the market the camera is in. If you came from a 1DX, Mark II or Mark III….well now you have to buy SD cards! If you’re coming from a Mark III then you probably already have CFExpress. Either way, you have enough money to buy a $100 64GB card or $175 for a 128GB if you plan to shoot just photos. Or you can splurge on the higher capacities. Heck, I remember a free CFast card used to come with the 1DX Mark II when it came out! I never got my damn free reader!!! Haha
Canon and other brands should just make us rip off the bandaid here…only the new format - and here’s why: I have now run into several people shooting the D850 who never bought a CFExpress card and just shoot with their camera as a single card because the readers are “too expensive” or they don’t want to buy them because they have SD cards already. So there is something to be said about people moving from one generation of camera to the next not adopting or investing in new media. It’s likely that some R3s will meet the same fate,but I feel like that’s a totally different market.
Oh well, this doesn’t bother me personally but I understand it will others. I use the dual cars more for utility and file organization with photos on one and video on the other…but it really would make more sense for this camera to have 2 of the same. I’m sure Tony Northrop is pumped to insert some old, slow, corrupted SD card into that slot and then claim the camera is terrible when shooting to 2 cards. LOL