I don't like to hear the mechanics of the camera "coming to life" when all I want to do is review photos - often with the lens cap on! Is it possible to start Sony cameras (e.g. A7iii) in playback mode directly, without first going into "shoot" mode?
According to the ILCE-7M3 Help Guide, Viewing images on a TV using an HDMI cable, the camera should enter playback mode when turned on while connected to an active television via HDMI. However, the instructions mention the possibility that the camera might not enter playback mode directly.
Otherwise, the only method of entering playback mode mentioned in the manual is to press the playback button after the camera has been turned on.