> it may have simply seemed somewhat obvious to many at the time and nobody bothered to hold on to or archive it.
I suspect this has been the case for many especially last century, everything was moving so fast and there was so much choice, it really was a free for all with no major players dominating the market place and some people didnt know the significance of what they were doing or building. People then retire or get moved to different projects and the knowledge gets lost.
