When we think of an innovative idea, we immediately think of new, frontier technology. We instinctively believe that all good ideas that rely on old, well-established technology must have already been invented. As it turns out, this belief is wrong: once in awhile some truly brilliant person comes up with an ingenious way to use something very old to produce something very new.
As a recent article on Wired discusses, something as old as a piece of iron, when molded in a shape of a fish, transforms into a life-changing innovation....
https://teamupstartup.com/blog/low-tech-and-ingenious-transformative-ideas-that-do-not-require-new-technology/