if we are to continue to use things which are based on the semiconductor property of pure silicon, we're going to have to find other ways — which may not be economic in today's economy — to purify it.
If there are any.
This feels personal to me. For me, computers have been a liberatory technology — one that transformed a child who could not write into a highly skilled practitioner of a valuable craft. Without them, my life would have been much poorer — in every sense of that word.