What are some examples of things you "always" need that require unsafe Rust?
Not him, but projects that need performance often use unsafe or otherwise allow for UB. Embedded is arguably another example, since no_std allows UB even without unsafe, for instance by causing a stack overflow.
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Not him, but projects that need performance often use unsafe or otherwise allow for UB. Embedded is arguably another example, since no_std allows UB even without unsafe, for instance by causing a stack overflow.