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> With content addressed derivations you can guarantee that any party can recreate bit-by-bit identical copies of derivations

It wouldn't guarantee anything. It would force you, and anyone else, to do massive rebuilds when some binary down the tree changes, or has a regression.

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My writing was imprecise, I meant to communicate that it makes it possible to trust the contents of a derivation, given that you know that the hash is correct, which can be verified independently in the cases where the derivation is reproducible. Content addressability makes it easier to establish and verify trust across systems.

Given the degree to which the post is referenced, I do feel that it misses out by only describing input addressed derivations and not CA.

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