Also you need the rest of the integrated system-on-a-chip, which no one else has designed and poses fundamental challenges to the PC hardware industry. Also you

Also you need the rest of the integrated system-on-a-chip, which no one else has designed and poses fundamental challenges to the PC hardware industry. Also you need to secure 5nm chip fabrication capabilities, which is awkward since Apple just bought all of the world's capacity. Then you get to start working on making the software work.