That said, I would guess the 'bigger conversation' is that it is much harder to tpyo <<import "github.com/DataaDog/datadog-api-client-go/v2/api/datadogV2">> than $(npm i dataadog) or similar in a "flat" package namespace (same for its $(uv pip install dataadog) friend)

None of those cited ones fix the dependency lineage issue, proving that release 1.1 was authored by the same chain of custody as release 1.0 of any given package. One can opt in to gpg verified dependencies in Maven, but it is opt-in. The .jar artifacts can also be cryptographically signed, but the risk that's trying to drive down is tamperproofing and not lineage, AFAIK