Sometimes you depend on stuff you don't even use. Or your dependency depends on it. Or the stuff only gives you little advantages. E.g. in Rust the failure crat

Sometimes you depend on stuff you don't even use. Or your dependency depends on it. Or the stuff only gives you little advantages. E.g. in Rust the failure crate saves you maybe 10 lines of code or such. But it has tons of dependencies. Or the lalrpop library crate depends on things only the binary crate needs because both are named the same way. You end up downloading and building things you don't even need. This stuff is fixable, the problem is that people don't care much about it.