> unlikely to ever be competitive Bold claim to say these challenges will never be surmounted. Either a more-economic technology would have to mature first, o

> unlikely to ever be competitive Bold claim to say these challenges will never be surmounted. Either a more-economic technology would have to mature first, or civilisation halt progress for that to be true. If scientific advances could yield miniaturised photonics that offer a significant cost/benefit over any contemporary technology the concept will still be pursued. Unless you are suggesting that it is theoretically and physically impossible?