How do you compare this to the effort in https://braid.org, which is also a decentralized web, which adds subscriptions that can operate in a tree (or DAG) of reactive state, each with its own validator and supporting different media types, and merging with merge-types?

Freenet seems to not interoperate with the existing WWW as much, while at the same time giving more specification on a specific routing and WASM validator. The existing WWW and Braid leave those decisions up to each particular host/authority to decide.