These do not look like very credible examples. According to NoVM's GitHub page, it has not been updated in two years. go-tcpip does not actually have a TCP implementation.
If you pointed out similar examples about C in the 80's, I would provide a similar reply, after all any serious programmer targeting the home market would use professional tools like Assembly.
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.
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.