You are kidding me, aren't you?! Get finally rid of those SD Cards, please!
Yet another disappointment from Canon, while others seem to have little to none heat dissipation problems.
The sky is falling!!!! Or MAYBE having two DIFFERENT slots and card types makes a LOT of sense.
1) laptops and computers have SD readers built in. At least Macs do. Not sure why anyone who's a photographer would use a Windows machine but that's their choice.
2) heat and space issues in the camera body.
3) price: SD's are less expensive
4) speed: I buy the fast SD's and they read and write very fast. And when archiving to SSD drives versus hard drives it's even faster. If someone really needs more speed, guess what.... the second slot is an Express. Duh.
5) If you need an external card reader, the SD readers are small and inexpensive so they take up less room in your bag. The Apple SD dongle is tiny.
6) have you ever had to give your client the shots on the spot? Oops, they don't have a card reader or computer with a slot. I'd much rather hand over a less expensive SD card and not worry if I get it back or not. Try that with a $200 Express card.
7) ever been in a foreign country where a police or other law enforcement officer demands you hand over your memory card? I have. Again, I'd rather give them an inexpensive SD and then I still have everything written to the Express card and they probably don't realize the camera has two cards.
*If you haven't experienced any of the above or even
considered these possibilities you probably aren't a professional photographer or haven't had much experience.
Canon and it's engineers aren't idiots. They also know their customers and what PRO's want in a camera. That's why the R5 and the R3 have both kinds of slots. We pros want that feature. You're entitled to your own opinions, but just because there are other, better ideas out there doesn't mean Canon made a mistake.