Prysmatic Labs just released its biweekly updates on Ethereum 2.0:
1. Bitfly’s block explorer allows for very interactive, deep linking of items such as validator indices, attestations cast, finality of epochs over time, and more;
2. On Nov 21, Prysm nodes in the testnet observed a finalized checkpoint reversion which caused all incoming attestations to be rejected, and the issue is being worked on;
3. Significant improvements have been made in terms of initial sync block processing times by reducing concurrency issues in the database and enabling data compression to reduce overall disk I/O and storage requirements;
4. Documentation, features, and developer UX have been improved substantially;
5. A teammate put together a much-needed utility for Ethereum 2.0: a full-suite of test runners for end-to-end functionality of the blockchain, with tools ensuring the beacon chain can properly reach finality.