As I said on another thread, Canon will answer this. Oh yeah, in 2021 with a 5D Mark V with:
- 36 Megapixels, with a mandatory AA filter so you don't get all the sharpness
- Some improved video, but some last century codec to screw you
- 8 fps (as long as the battery is full or almost)
- No BSI sensor, who would need that?
- No stabilised sensor too
- an ancient regular SD slot
- Some super innovative feature like the dual pixel raw that does absolutely nothing usable
- No AF auto adjustment, if you're missing focus it's your fault, never the camera/lens
MAYBE we get a tilting screen and focus stacking...MAYBE
Canon didn't see my money with the 5D4 and with the way things are going I might still keep my 5D3 for a very long time.
I'd make the move today if I could trade my gear for equivalent Nikon lenses and flashes without losing too much money.