I don’t think that a package manager and cargo should be included by default, if Rust compiler and the standard library was installed. One can use the compiler rustc without Cargo. Also there are works to create a new independent compiler for the GCC framework, but that takes forever it seems. That would off course mean that many projects cannot be compiled without a package manager and all their dependencies. But it would make it like Python (and C compilers) be possible to compile individual files. That could make it to a standard way of distributing simple projects which does not require any external libraries at all. This could encourage such projects too, which isn’t a bad thing at all to me.