Nuckinfutz,
A little bit about friction stir welding. Invented in the UK early 1990's. Has been in use in many, many industries world wide since then. These industries include automotive, ship building, offshore, aerospace, railways. Apple only started to use friction stir welding this year. So not an innovation. Lenovo, Asus, Dell, Sony, Hp and Toshiba all used it before Apple.
Many companies used plasma deposition before Apple, ditto laminated screens and Custom SoC processors. I am not sure about what Apple call Fusion drives, but I seem to remember using the equivalent back in the 1990's.
As for custom processors and hand laying, have a look at the history of designing processors.