[technion]

I'll raise one set of shared libraries in particular: graphics parsers. Whether you're writing in PHP or Ruby or whatever, odds are you'll end up manipulating graphics in some C library.

Imagemagick has a long history of issues (although I appreciate the most recent, major issue could have been written into any language). Mozilla only just audited libjpeg-turbo and found a series of issues, and a quick Google will point to most of the options being terrible.

I'm sure someone will (if not already) write a decent Rust alternative - but what everyone is missing at the moment is bindings for their favourite high level language with comparable APIs to their existing tools.