> Even if we accept the premise that unsafe Rust is harder than C (which frankly is ludicrous on the face of it)

I think there's a very strong dependence on exactly what kind of unsafe code you're dealing with. On one hand, you can have relatively straightforwards stuff like get_unsafe or calling into simpler FFI functions. On the other hand, you have stuff like exposing a safe, ergonomic, and sound APIs for self-referential structures, which is definitely an area of active experimentation.

Of course, in this context all that is basically a nitpick; nothing about your comment hinges on the parenthetical.