For the first few weeks of owning the R I shot Raw + Jpeg. It makes no difference to the camera. Even on long bursts. I never found the end of the buffer
Interesting… I would think the card speed made no difference…. I mean the buffer is the buffer. Not sure how it would
affect the shutter sound or smoothness.
And 4k and C-log are the most demanding on the card as I know it. My preference is 1080 ALL-I.. 4K can eat a 128g card is just a few short minutes
But remember the camera has 30 megapixels so when that many megapixels you have to times that each time it writes to the buffers one will slow down. Like a SSD drive vs a Sata drive.