What I think that you and others are not given credit is that most upstream
maintainers have very long lists of things to do. The NFS team is swamped doing
support for pNFS (version 4.1) and has been going through massive change for
example.
When you have a very invasive feature that requires the entire world to change
and brings no domain specific advantages to users of impacted subsystems, you
should not be surprised that you see resistance (what new capability does NFS
get from the systemd changes for example!).
That is where you need to use charm and persuasion to move things along :)
Ric