Hey, thank you for bringing up this topic. To make it happend we should start with eliminating C++ dependency, but there are at least 2 blockers for that right now:

1. Current exception handling is based on C++ exceptions under the hood. We'd need to provide a runtime for personality functions first and modify the codegen.
2. We use embedded code of libunwind to provide stacktraces - this code is using c++. Even if we'd use an already published library we'll still need

For both of them we currently need to provide C++ runtime. There is a goal to remove this dependency, but it had never priority big enough to spend precious resources on that.

There's also a long list of functions which are always rechable and linked to allow for safe code lowering, we'd need to handle this as well.

However, in my opinion, Scala Native was never aimed to be a target for really low-level programming. The main purpose was to move existing high level language out of the JVM and it's limitations, while keeping similar code semantics and capabilities. In it's current state it's strongly coupled with both GC and runtime using large amount of C stdlib + POSIX/WindowsAPI to reimplement most of Java Standard Library.