[dozzie]

This requires a programmer who writes a lot in both languages, who has enough energy left to help with two package managers, and who happened to be in the right places in the right moments to actually join the projects.

It's already very hard to find a programmer that writes a lot in more than one language and cares about packaging/deploying software.

[Animats]

That's a problem for a team. Having written in both languages, I consider package management to be the biggest problem in both.

(And then there's catkin, the build system for the Robot Operating System. That's the build job from hell. ROS is a message-passing environment to which a huge number of existing packages have been adapted. Multiple languages, different underlying libraries, and no central control of versions across packages. It sort of works. Although there are bad days when it breaks the Ubuntu updater.)