Huh? Have you seen a Linux system in the past, oh, I dunno, 12 years? Package management on Linux is the absolute best available. apt-get/dpkg and yum/RPM pretty much rule, and you'd be nuts to choose Mac OS X package management (or the absolute lack thereof) over either of them.
There may be many wonderful things about Mac OS X, but package management is not among them. And, interestingly, it is one of the wonderful things about Linux (excepting the mildly retarded distributions...which shall remain nameless, but they rhyme with "Gentoo" and "Slackware").
The interesting thing about package management is that until you've actually spent some time with a better solution, you'll think great things about a significantly inferior solution (Mac OS X, for example, where a "package" is effectively just a big ball of crap that spews out across your system on install, and can't be verified, uninstalled or upgraded cleanly, and can't really deal with dependencies). After spending 10 years with systems that know where everything is on the system, and what the dependency chain looks like for every installed application, and can upgrade/downgrade/uninstall anything using a single command, I sit down to a Windows or Mac OS X system with what can only be described as dread.
It's the one thing that would absolutely be a deal-breaker for me, with regard to using Mac OS X heavily (particularly for development). The big ball of crap packaging is just too painful.