If we want to look at it from a non-academic standpoint, the lack of these tools makes it unpleasant, and the lack of use cases makes it seem a waste of time to investigate.
The argument of "If you want these features, write them yourself" is not wrong, but it ain't winning any friends either.
A simple thing that the Plan 9 fans could do would be to explain what cases would justify picking it over some other *nix--that alone might be enough to get some of us busier programmers to justify sinking our (small) free time into adding stuff to it.