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But https://github.com/rust-lang/rust/issues/63818 and everything it links to I think is a roughly centralized picture of it.
GhostCell is powerful enough to implement doubly linked lists in safe Rust which is quite a feat. https://github.com/matthieu-m/ghost-collections
I think you should first do the opposite: take a situation where RefCell is currently needed (and not just thrown there as an example) and try to see if there's a way to prove that it won't panic. Then see if there are patterns that can't be proven with the same logic. As a start you could take the bad but safe deque from the learning rust with entirely too many linked lists book