Additionally, the process of doing the physical engineering has changed drastically -- computational tools, design space exploration, optimization methods. (recognizing that the grandparent comment stuck specifically to screw-tech, but it's interesting to think about physical-engineering-innovation in broad terms)
Then there are innovations in manufacturing enabling new designs. 3D printing is coming along. Not everybody has to pull from a catalog of shapes, thicknesses, etc, for structural design.
Then there are innovations in manufacturing enabling new designs. 3D printing is coming along. Not everybody has to pull from a catalog of shapes, thicknesses, etc, for structural design.