Re: Apple Arm....
"You can see why Apple made the change. And when there's talk of 5nm.... Intel are nowhere near"
I'm not sure I agree with your line of reasoning.
Apple made the choice to move to ARM because of cost - they had the scale of demand from their own devices and saw it as a potential competative advantage in the mobile space which is where the majority of their market is and it likely has an impact on development costs if x86 disappears in the future.
For performance, it is a case of Apple hoping they can keep pace with performance on the desktop side. ARM performance is sufficient at the moment but it will depend how quickly desktop workloads shift to multiple cores as there is still some way to go there. For single thread performance, ARM still has to embrace the designs and processes (they use the low density, low power process nodes) necessary to sustain high instruction counts at >3GHz frequencies so there is likely to be a gap on the performance side. And while I've seen benchmarks that show ARM is capable, they have to be taken with a grain of salt - good results in SPECxx only matters if that matches your workload.