[steveklabnik]

Rust works great in embedded. You do have to learn some things about how to get binary sizes down, depending on how resource constrained you are. If you're on a device that's running Linux, you probably don't need to think about it at all. If you're on a device and writing 100% of the code yourself, you may have to watch out for certain things, like formatting code, that can add a bunch of bloat, and choose alternatives.

At work we have a de novo microkernel we're using for the firmware of a few things inside of our product. A recent build we did to check on binary size of OS + 5 simple tasks using 22kb of flash and 3.5 kb of RAM. Those tasks are all separately compiled programs, it all gets put together on one single image to flash.

If you're talking 8 bit micros, you run into platform support issues before you even get to the binary size stuff, but if you're on Arm, even the low end, size is not the primary issue when it comes to doing Rust projects.