I definitely appreciate the analysis, since analyses of any kind of stressful interaction are helpful. But I did want to comment on a small thing:
YC is a very special kind of interview.
I assume that this is referencing the previous bits of TFA, so I'd suggest that possibly YC is a COMPLETELY TYPICAL INTERVIEW FOR THIS KIND OF SITUATION.HN is a wonderful resource, but the idea that a YC interview is of "a special kind" is naive. [I'm sure the down-votes are heading my way...] YC is a type of VC-ish firm. Getting to pitch to any VC is rare and the kinds of questions mentioned in TFA are pretty standard. YC is going to invest their time in you and that is quite expensive for them to do, so it makes sense for them to push you in lots of directions to see how broadly you've thought about the problem.
Random: I was in a board meeting yesterday getting peppered with questions about AWS AMI setups, framework choices and API load resiliency... And I'm just an advisor. Investors care a lot about a lot of things.