My experience is that Rust advocates often go well out of their way to specify the limits of Rust’s protection, and will even rush in to correct someone who over promises what Rust can give you.
But seriously, yeah, the seasoned Rustaceans I've known have been pretty thorough in giving downsides/limitations as well. It's something I love about a language; when the voices in it are aggressive in talking about things it does poorly, or use cases it's not optimal (I still love that Erlang's official website has a section for when _not_ to use it).