I think you missed "native development". I'll rephrase:

Could a toolset to develop in Odin be made to run on (not just target) an STM32 microcontroller like you used?

> It's just C with nicer syntax and modern data structures

That suggests the above would (in theory) be possible for any device that's roughly in the same class as "can run a C compiler". Correct?

> It's just C with nicer syntax and modern data structures

it's not, it's llvm