Your statement is outdated. 10 years ago, before the sensor technology was fully developed, it was very hot at work, which affected our lives. There are many problems with the camera function. In the initial stage, the camera is an unimportant function. Now it has reached the era without counter-revolution, and the sensor technology has been greatly improved. Taking a video is almost equivalent to taking a picture. And since mirrorless cameras turned on the computer, the sensor has been working, and no brand of mirrorless cameras will die soon. The recently released Sony a7s3 is a machine specially made for video. You can shoot it without affecting your life.