It should work fine. In C and C++, it's straightforward to YOLO it -- all you need is a pointer and a length. Rust can do more or less the same thing but with compiler-enforced safety. Many GC/ARC languages can efficiently handle slicing buffers, and it mostly comes down to library design. (Even Python can do this, although you generally pay for it in the rather large cost of every other operation...)
It took me a few tries to convince myself, but I think I agree with you that Rust can do this with lifetimes and unsafe. Importantly, the unsafe is self-contained, can be reliably generated by macros or codegen, and the end user doesn't have to muck with it.
