The backdrop on this topic is the recent news of Debian's Ruby package maintainer quitting, mostly due to issues he has with the Ruby core community and the maintenance/release process.

This post by Matz was supposedly submitted to debunk the myth that "Ruby's not for Debian", but it is entirely orthogonal to the issue at hand. Matz undoubtedly compiles his Ruby, as most maintainers would do with their projects, rather than install using Debian's package manager.