Wise,
I am most assuredly no material guy. I apologize to anyone I gave any impression I am.
My thesis is quite simple and backed by some specialized experience. Revolutionary change such as that which photonic computing would introduce is far more than adaptation to "disruptive" technology, in the current idiom. It requires vast changes in societal structure to accommodate.
I once loved the tales COBOL programmers told of trying to explain to bankers what needed to be changed. As a FOTRAN programmer for scientific and technical objectives, I didn't love at all trying to figure out how to connect to the business -oriented modules for whom English majors were preferred as programmers over mathematicians.
Both programmers have become obsoleted by enormous advancements in hardware but there is an odd thing yet.
When computers used vacuum tubes instead of transistors and a massive computer would fill a large room by itself requiring teams of operators, programmers, engineers, bulb changers, whatever to do far less than any $5 calculator does today; that monstrosity did pattern recognition with fair success while today's supercomputers can't do much better.
That is history, the rest is only my wild, blue-sky speculation.
I suspect Terry Turpin's small, costly optical computers are doing something DOD is quite willing to spend a bundle on and a natural for such a computer: analog computing that can deal with pattern recognition far more easily than digital computation.
That would explain the constantly renewed search for new and better plastic and Turpin being disappeared.
Speaking more plainly, we've been in Kansas all along and just didn't recognize it, being so flat and all.
Best, Terry