I couldn't agree more. And in the rare cases where destructors do need to be created inline, it's not hard to combine destructors with closures into library types.

To point at one example: we recently added `std::mem::DropGuard` [1] to Rust nightly. This makes it easy to quickly create (and dismiss) destructors inline, without the need for any extra keywords or language support.

[1]: https://doc.rust-lang.org/nightly/std/mem/struct.DropGuard.h...