Where the Rust channels are hosted is not a Mozilla decision. It was a Rust community decision made some time ago, when the set of alternatives was smaller than

Where the Rust channels are hosted is not a Mozilla decision. It was a Rust community decision made some time ago, when the set of alternatives was smaller than it is today. Separately, Mozilla has decided to shut down its IRC server. This impacts the users who remain on IRC, but the decision was made by the various community teams a while ago.