Bryan providing some actual buffer performance. Gone are the days of 20-23 frames with the 5DIV and, what, as I remember 9-10 frames with the 5DIII (using the SD card).
https://www.the-digital-picture.com/...spx?News=34990
Granted, I am using the second fastest fps (7 fps not 14) on my M6 II. It takes a lot longer for the buffer to fill, and AF is better. But, if you want performance, this is what the R5/R6 have.