Even more fragmentation? As a dev I'm not going to make packages for anything other than 'pip install' and maybe Ubuntu if you're lucky. I would also heavily discourage distros from shipping ancient buggy versions of the package, which is all distros are good for these days.
What I actually like is using the system package manager to install stuff. pacman -s or apt-get install
letting multiple packaging systems muck with your system is a recipe for hurt somewhere down the line.