Can any of these be programmed with Rust?
The best part: You can use many of Rust's high level zero-cost abstractions. Just take a look at this example code which compiles to very efficient assembly: https://github.com/japaric/discovery/blob/116fe76491d661b5ee...
* does it have an LLVM backend?
* is it listed on the forge page?
* is it listed as having std support?
The farther you go down this list, the simpler it gets to use Rust for it.
Latest work has been on ARM boards and a ton of work on AVR, which brings 8/16 but support.