What you felt as a combative tone, was actually me being defensive… let me explain…
To call ROCK an “installer” for Roon is to grossly mischaracterize both what it is and the amount of effort that went into creating it. ROCK is a turnkey hardware platform minus the hardware part 
Most hardware vendors don’t put as much energy into their operating systems as we did with ROCK. This, coupled with the fact that there was an inherent expectation that ROCK would be free, offends me.
You are spot on when you said:
I agree with all of those points, but ROCK is not an enhancement or update to Roon. People pay for products like “AudiophileOptimizer” to get a trimmed down Windows system for their audio experience, and that is just an installer/uninstaller for Windows. ROCK is a full operating system built for audio, from scratch, optimized for Roon, streaming audio, digital audio, and to be an appliance in the home.
So why am I arguing all this when we have no plan to charge for ROCK? I want to accurately set expectations. I’d like to make it clear that what members pay for is Roon at the time of purchase + what you said above (stability,updates,support,enhancements). It is does not automatically include every piece of software/hardware/service that Roon Labs creates in the future. It is exactly our plan to provide more products/services for sale, some related to Roon, and some not.
Re-reading your first post, I think I misread what you were saying. You were saying you were paying for support and not that ROCK should be a freebie. I apologize for my defensive posture – it’s been a long day.