Well, I'm quite bored of the endless stream of memory safety vulnerabilities that can be systematically eliminated with memory-safe languages like Rust. Note that every single one of the CVEs disclosed yesterday in dnsmasq are memory safety violations, and the fact that buffer overflows, data races, and other related errors are not only pervasive, but also tend to sit around for years in codebases[1].
> Nobody would criticize assembly for letting you shoot yourself in the foot, C is much the same.
It's completely acceptable to criticize the choice of any tool. I can and do criticize the use of C for any code that touches a network and in some cases consider it willful negligence, as using a non-memory-safe language to parse untrusted data is asking for trouble.
[1]: https://twitter.com/johnregehr/status/914663997647069184