Not untrue, but the post doesn’t mention prior work, so it’s implying that Rust is one of the only languages that has these features, whereas even C++ (notorious for being unsafe) as a majority of the features (in Clang). Clang can even catch many data race issues with the proper annotations. Maybe it’s ignorance, but given how posts proselytizing Rust tend to get popular on HN, it makes me suspicious that the omission was intentional.