I can think of at least one YC startup -- one that was relatively high-profile, for a hot minute, at least in the developer space -- that just shut down, period

I can think of at least one YC startup -- one that was relatively high-profile, for a hot minute, at least in the developer space -- that just shut down, period, that doesn't seem to be on the list, because I worked there. One extra irony point for its absence: it was basically across the street from Y Combinator's office in Mountain View at the time. :)