Each dependency of a software package would have its own separate set of reviews.

Anyone can produce a review using Vouch. Official reviews will also be published in the future.

So every version of every dependency of every package needs a review? It only takes one version of one dependency of any software package to be compromised by supply chain.

Each developer may choose to minimize the software dependency attack surface to a different degree.

Perhaps they would trust a package published by Google without a review. But would require a review before using a package from an indie developer.

Incremental decreses in the attck surface are valuable.