Obviously there's a difference in man-power and funding, but has anyone done an analysis of how Apple moved MacOS from PPC to Intel and the application of those ideas to AmigaOS?
Apple never did this "move", the OS was running on Intel since NeXTStep days. It was ported *from* Intel *to* PowerPC through the days of Rhapsody, released as OSX once port was done. And for how many years was OSX as product PowerPC only? Very few, just enough for third party developers to move away from old MacOS.