We have a working 90overlay-root module in Debian which can mount a NFS directory. Currently I see no need to replace this with a new implementation, that was not working when I tested it last time. I also wonder why upstream does not include it? Are there quality issues?
Currently I have no time to spend more time into it, because I have to focus on my other software projects. It would be nice if you could test and report if it works for you. -- regards Thomas