The author insinuates that the breakage is intentional, but I'm not convinced that it is. For instance, one of the cited issues is that newer cargo versions can

The author insinuates that the breakage is intentional, but I'm not convinced that it is. For instance, one of the cited issues is that newer cargo versions cannot parse the old Cargo.toml. However, as far back as 2016 cargo was maintaining backwards compatibility when making bug fixes to its TOML parsing. [1] [1]: https://github.com/rust-lang/cargo/pull/2680 https://github.com/rust-lang/cargo/pull/2680