Seriously? It’s a CAR... My 7D would have easily gotten that, let alone my r6. I’ll give you that the R or RP might have struggled with it, but the R5/R6 wouldn’t. Nothing against the 1Ds. I used to own them and loved them, but you’re shortchanging the AF of the R5/6.
If the EVF is blacked out when this is happening you are screwed on the R5/R6. Something quick like this, startled animals, something that you basically put the 1Dx2 on and hope it gets the shot.....and it gets the shots....Is why the DSLR's and a 1Dx AF systems are still superior tools to the R5/R6
You dont have to wait for the camera to engage. Its on and ready to go with a DSLR...you have a a chance of getting the shot. i have talked to way too many wildlife mirrorless owners who confirm this is indeed the drawback to Mirrorless technology. The lag from black put to active shooting is a reality