I also do this. I make use of Capsicum/seccomp-bpf and jail/chroot to a ro mountpoint, use SSP, ASLR where possible, ... But I still use C as my primary programming language. I've also written code in golang professionally for a year or two.

It's quite common in the embedded space to use C or C++. It's easy to run everything as root and skip fundamental bound checking, so those languages get a bad rep in that space. Totally understandable. But it is possible to engineer solutions that are a lot safer too. It's just a question of priorities. Companies not prioritizing writing safe code or not working on having a safe architectural design will not bother with Rust or other memory safe languages. There's little to no market incentive in most areas. Sad but true.