[steveklabnik]

It has nothing to do with Mozilla, specifically. Binary packages are very tricky. I'm sure Cargo will figure it out and eventually grow support, but this isn't some sort of top-down policy.

[crzwdjk]

It would be kind of difficult to have binary packages unless you have a stable ABI, and Rust doesn't have that yet. If and when it does get a stable ABI, binary packages would at least become a possibility. There are good reasons why Rust didn't want to commit to a stable ABI initially, but perhaps at some point the benefits will outweigh the costs.

[steveklabnik]

You can do it, it just adds another axis to the matrix of things you have to support. It's a significant drawback.

Regardless, the point is that all of this is technical and has nothing to do with Mozilla's love of open source.