Even though the apt-get code is GPL'ed and therefore available for all to read, the majority of people miss a few subtle points in the source code. The assembly optimizations. The OpenGL hooks. The MP3 streaming capabilities. Instant messaging interfaces. Links to satellite tracking networks. I believe apt-get to be on par with such great open source works as the Linux kernel, Apache, and xbill. It is about the package format. It is about apt-get. It's about standing up and saying "Dammit, I'm sick of RPM not having any cluster management capabilities or Mac OS X Expose-like animations, I'm mad as hell AND I'M NOT TAKING IT ANY MORE!"