Even when C like performance is required, C++ is actually used instead.
The three major C compilers (gcc, clang and VC) are all written in C++ nowadays.
In the enterprise world Java did that - even high frequency trading applications have been Java based for quite some time. Compared to 20years ago, there is significantly less C code nowadays.
http://wiki.osdev.org/Go_Bare_Bones
"Novm Is A KVM-Based Linux Hypervisor Written In Go"
https://www.phoronix.com/scan.php?page=news_item&px=MTg4MzA
"A network stack written in pure Go"
https://github.com/unigornel/go-tcpip
Surely there are other similar projects around the web.
One needs to start somewhere, but apparently to impress HN one needs to hide in some cave and present a done product after some years hiding, as the fashion driven industry has lost most visionaries.