It is easy to see why the system package managers in that are in use are not sufficient. The distro packages are too bureaucratic and too opinionated about all the wrong things.

I don't disagree that it would be nice if there was more interoperability, but so far I havn't seen anyone even try to tackle the different needs that exist for different users. Heck, we really havn't seen anyone trying to build a cross-language package system yet, and that should be a lot easier than trying to bridge the development-distro chasm.