TheEEStory.com

He is not a physicist and says he cannot comment on fundamental physical limits (from his expertise). He highlights saturation as a killer problem but adds temp & piezo stress. And he thinks production is bound to cost too much.

This guy is not claiming to be competent to judge physical breakthroughs but nevertheless is confident based on his knowledge of current technology. It is fair enough - and I agree with him - but for surer reasons!