Perfect timing, for me anyway. I just started playing with Rust and felt like a package manager was missing, but not because I needed to install packages. I felt a package manager was missing because I looked around and noticed there weren't really any libraries yet!
It's a neat little language and I like that Mozilla is behind it. I don't have any scientific reasoning for why I like Mozilla, I just do. Steve Klabnik has a nice getting started guide[0], it's aimed at Rubyists but I think anyone with programming experience can benefit from it.
I think a lot of people will point to Go as not having a package manager (does it still not have a package manager? I know there was a lot of discussion a few months ago about this) but Go has incredibly well designed standard libraries. I wish I knew what was keeping me away from Go, I just can't quite put my finger on it.