I didn't get the R7 to replace my 90D, which, like an 80D, 70D, and T2i were my main cameras for (mostly) insect macro, and birds: The only photography where I fight with and use some of the limits of the camera. I still have an R8 and M6ii, and they are great for all the general use, night, and travel, but I've switched to OM System for birds and bugs. Some of that is m43 specific, you can get sharp and light and cheaper telephoto as long as you don't mind the (equivalence) slowness. Specifically the 300 f4 (so like an f8 on ff) pro is a great lens, and I am happy to trade the slowness (but bright enough for fast focus before dawn, even with 1.4 adapter) and lightness vs 100-400iiL or 500f4IS on a Canon FF or APS-C. But the other reasons were (as mentioned here) loud shutter and especially rolling shutter in e-shutter mode. The OM-1 is fully functional in electronic shutter (aside from maddening having to remember to set the SS to 1/100 and only the basic silent shutter mode when you want to focus bracket with flash). The ergonomics of the R7 can't be worse than OM Systems, where I find myself having to re-learn things because they aren't ever intuitive. The mechanical and e-shutter limits were the most important things, as well as being a little behind in computational stuff. While we're at it, I'd really like to see some no-cost (for canon) upgrades, porting the 32 1.4, 20 f2, and less urgently the 11-22, and of course a capable but smaller m6-ii like body, and an end to hunger in a world of plenty.