Well, for context the speaker pointed out in the past that there were no presenters of color at Rust conf at the time, and they themselves would have been the first person of color to do a keynote if they'd been allowed to do it.
I don't know if that was a motivation here by the person who went solo or if they were just personally jilted over a technical disagreement about the best way to handle reflection, but from the outside it looks quite bad regardless, which shows again more consideration should have been paid to this decision.
