Maybe I don't know enough technical details about these CPU architectures or IP agreements, but I don't see why IBM couldn't have done what Arm did but with PowerPC.
Not now. But my question is, what was stopping IBM from doing what Arm did? We are where we are now and it's too late. But as far as I can see, there was nothing too special about Arm as compared to PowerPC back then, on a technical level.
