I agree that it's unlikely to happen, but not for any of those reasons.
* Rust is no harder to learn well than C, as someone else has already commented.
* Rust compiling too slowly is just an attribute of its current implementation — there's nothing about the language itself that makes it any slower at compilation than, say, C++.
* C interop isn't hard at all in my experience. Do you have any particular complaints?
* it's no less safe than VM-based languages. In fact, given the guarantees it gives you wrt parallelism, I'd say it's more safe than most VM-based languages.
* Rust is no harder to learn well than C, as someone else has already commented.
* Rust compiling too slowly is just an attribute of its current implementation — there's nothing about the language itself that makes it any slower at compilation than, say, C++.
* C interop isn't hard at all in my experience. Do you have any particular complaints?
* it's no less safe than VM-based languages. In fact, given the guarantees it gives you wrt parallelism, I'd say it's more safe than most VM-based languages.