Probably every Airbus A350 XWB and a lot of GM, Nissan, and Suzuki cars. Maybe also a few or a lot of General Electric products. [1]

The Library of Congress also recommends it for preservation of digital content, which would be harder if Rust compilers were lost. If all C89 compilers were lost, it would be much more simple to create a new one to compile SQLite than it would be to recreate a Rust compiler.

[1]: https://www.sqlite.org/famous.html