pgrust is a Rust rewrite of PostgreSQL targeting compatibility with Postgres 18.3 — disk-compatible, boots from existing data directories, and matched Postgres's expected output across >46,000 regression queries and now reportedly passes 100% of the regression suite. The newer implementation uses a thread-per-connection model and claims large performance gains (≈50% faster on transactional workloads, ~300× faster on analytical workloads) but is experimental, not yet production-ready, and lacks full extension compatibility.

The author proposes running ActivityPub atop an AT Protocol Personal Data Server (PDS) by using ActivityPub actor documents as indirection to ATProto xrpc endpoints, arguing this could give users portable, signed data and reduce siloing. He outlines practical interoperability snags (e.g., GET/POST mapping for inboxes and handle/DID alignment) but finds them bridgeable and worth exploring.