Yeah, but in stills mode, the 1DX3 also does "only" 20 FPS, yet this camera is claiming 20 FPS @ 45MP with electronic shutter.
So, it begs the question, did they limit the 1DX3's stills throughput, when it could possibly do 30 FPS or 40 FPS RAW stills, without AF?
I suspect that there is a lot...