Optech's latest newsletter features discussions on a constant-time parallelized UTXO database and Bithoven, a formally verified language for Bitcoin Script. The newsletter also covers dust attack mitigations and consensus changes, including SHRINCS, a 324-byte stateful post-quantum signature scheme, and the Falcon post-quantum signature proposal. Additionally, the newsletter highlights the release of LDK 0.1.9 and notable updates to Bitcoin Core, Core Lightning, Eclair, and Rust Bitcoin.