This has not been publicly revealed yet, I believe. The person at RustConf who made the decision to downgrade the talk has admitted their role (see https://www.

This has not been publicly revealed yet, I believe. The person at RustConf who made the decision to downgrade the talk has admitted their role (see https://www.reddit.com/r/rust/comments/13tsmht/comment/jlxmcnb/ https://www.reddit.com/r/rust/comments/13tsmht/comment/jlxmc...).