[BufordTJustice]

At least in the storage space (which gets essentially no press on HN), I have come to the finding that the vast majority of core product codebases are C/C++. For the niche they fill, it seems really unlikely that even the still experimental Rust would replace them here.

[steveklabnik]

Dropbox has re-written their storage layer in Rust https://www.reddit.com/r/programming/comments/3w8dgn/announc...

That said, they're the only one I know of, so your point still stands, generally.