Cool! Trying out new ideas is very good way to open mindsets, even if those systems aren't used regularly, they serve as inspiration for future improvements.
It has some pluses, I miss an updated version of "The Design and Implementation of the FreeBSD Operating System", but it is understable there are other priorities and putting such a book out is lots of work for very little money, given how much book authoring gives back.
I know you've been an advocate for OSes and languages that are outside of the mainstream.
I finally got around to living in plan9...
My experiment, a social network for plan9 written in rc and some awk.
https://github.com/dharmatech/9social