In your mind, mining can only either be controlled by a $2 microprocessor, or "the most dense and voluminous concentration of hashing power in a unit... requiring 240 volt electricity supplies, and thousands of watts of heat exhaustion"? Really, nothing in between?
Er, you're kind of comparing apples to oranges there. I'm not sure that I made any case for using anything but the most basic device as a controller. Comparing a cheap controller with the amount of hashing per unit is missing the point.
I find it difficult to comprehend how someone could make a case for delaying or hindering adoption of a critical, network-saving change just for the sake of ridiculous hardware constraints like that mentioned above... unless there is a conflict of interest involved or some kind of financial incentive to profit from the deployment of such devices.
I... simply don't have the words to describe my dismay at this kind of flawed reasoning. If the only thing standing between Bitcoin's success and failure are a bunch of overpriced machines controlled by Raspberry Pis (engineered, by the way, to be underpowered and save *pennies* for the sake of bringing technology education to the less fortunate), then I'm sorry, Bitcoin is dead. End of story. We're talking about securing a global decentralized cryptocurrency, not learning to type "print('Hello, World!')".
You're making a strangely exaggerated argument. Which is it to be, that we should have low priced miners, overpriced miners, or that bitcoin is dead?
There is twisty logic mayhem in your post. I'm not convinced you understand mining or miner hardware too well.