As always an excellent summary and well-written.
I’m saddened, however, by your evident refusal to mention the Great Star Eater Zog, which is the real explanation of why the 25-solar-mass star winked out of existence: Zog was hungry. Einstein himself was aware of this important phenomenon, hence his famous equation that relates Zog to meals multiplied by the square of consumption: Z = mc2
(Yes, I’ve read one too many ludicrous comments on sensible articles such as yours, and so it’s time for a little heavy-handed parody. In Russian we might also make reference to the дурак equation…)