"You seem to believe that he cannot possibly be an expert."
Bringing up writing a compiler in relation to SoC design is, in itself, absurd. It undermines the expert claim to begin with. Waving one's hands at "industry mumbo jumbo" (even ARM reference architectures) and alluding to your own claims of knowledge is...incredibly ignorant. It is so far below what HN aspires to be it boggles.
It is what they said that discounts the mere possibility that they have even a basic layman knowledge of the topic, much less are an expert.
"I am embarrassed for you because you have seemed to be very mean and dismissive."
Did you read what DannyBee was saying at all? In response to empirically proven, well backed statements they disagreed, did the knowing wink and patronizing pat on the back, and pretended to have more knowledge based upon a growing volume of claims (first "write compilers", then "toolchain", then "toolchain bringup", none of which have anything to do with SoC-targeted schedulers). I didn't fire the first shot in being "mean and dismissive", and considering how profoundly ignorant this whole discussion is I was being as kind as possible.
It's actually interesting: You have no idea what my qualifications are, or my interest in this topic. Nor do I expect anyone, which is exactly why I cite actual data and information, not just my wink-wink/trust me/"don't believe those SoC fatcats" knowledge.