@Speed_Racer, I think you are missing something.
Roon’s performance needs are not going up over time (well, not much). CPU speed is getting faster at a much faster rate than Roon can use it.
If CPUs keep getting faster and faster, it wont matter if you have the fastest (Apple), just that you have fast enough (everyone else).
Is the current fastest ARM CPUs, fast enough? Maybe Apple’s SoC is right now, but everyone will catch up to Apple’s current fastest. Let’s say the next ARM down from Apple today, is 50% as fast. In 2 years, let’s say both double in performance. Roon will be just fine on everyone else’s ARM, and even better on Apple’s, but no ROCK for Apple’s chips so it’s useless.