Rolling shutter on the RX100M4 has made hand-held video use impossible. It would appear great as an inconspicuous second camera or miniature pocketable option. Sometimes subjects are put off by larger cameras, so having 4k and great raw stills in that small package seemed like a perfect option. But from the first day, rolling shutter, and to a lesser extent poor IS, has made the videos pretty much unusable. I'm still happy with the stills, and I love the apps (don't use HFR much), but as a video camera, it's a total fail.
Here's my latest travel video from Ethiopia. To reduce the rolling shutter, I set the camera to 1080/30p, down from 4k, but still, the results are just unacceptable. The stills from the A7R2 came out great, and the footage shot from that camera also had better rolling shutter control. But I need a better small option for a second camera. Anybody have any suggestions? Thinking about the a6300, but heard that has rolling shutter issues. Maybe the delayed Nikon DL?