I don't know if this counts as substantial, but: 1) This breaks the silence, so it's effectively says "duly noted, please wait a bit more as we are trying to m

I don't know if this counts as substantial, but: 1) This breaks the silence, so it's effectively says "duly noted, please wait a bit more as we are trying to make sense of things". 2) The post is signed not only by the Core team members, but other team leads and Foundation directors. This implies that they are in working terms and care enough to think about PR, in form of this post. 3) People share the concern for the long term health of the Rust project. I don't see any reason to think this wouldn't be true, as I know that most people on the list are sincere (what I've witnessed via Twitter/GitHub interactions) and are doing huge amounts of volunteer work to support Rust.