Go Pro has this option and up to 10 photos in 1 second. Go Pro has this option.10) Simultaneous Video and Photo? Could be added via firmware but it wont because Sony hates supporting its products. 11) Looping Video, another standard feature on Go Pro's Hero Line, is useful when using the camera as a dashboard recorder.
Sony has the ability to power the device via USB, even with the battery out [which is AMAZING] but falls short by not including looping video. Again, not something you need to update the hardware to fix you could add it to a firmware update.
20) Play Memories on the PC doesn't have a way to delete videos.
Basically, the only real way to delete videos off this camera is to format the card.
Sure you would not have up to the second information, but hikers and climbers don't need up to the second information they need battery life.