I just dealt with my first bad camera experience on my Pixel 3 XL. I needed to take screenshots of some settings on my PC and was rotating my phone back and forth from vertical to horizontal. Holy smokes, the lag! If I turned my phone sideways it froze and took maybe 1 to over 1 second at times for the camera to properly rotate / adjust. This was just taking photos with the rear camera, no idea if video is affected. It isn't a major deal to me, but I tried the same thing on my S10e and the camera is instant every time.