RTOS Exploits
Just recently we learned that the TCP stacks of an RTOS would make things like medication pumps in hospitals exploitable. Some of these exploits would not work in Rust or Sappeur.
https://support2.windriver.com/index.php?page=cve&on=view&id=CVE-2019-12255
"doctors thought he would recover, but then he mysteriously died in intensive care"