I think this is the general "rewriting solves all problems" fallacy, which is rarely true, but who wants to maintain existing code, if there is something new and cool? So we get rewrites which largely just add new projects that then have to be maintained in parallel, because they rarely are to completely replace the old (if at all) and at some point the new is not cool anymore and that it is just another thing. I like some key ideas of Rust, but overall I still like many things about C much more (stability, fast compile times, simplicity), so I would much prefer people improving memory safety in C projects.