I'd be interested more in what features were in their (3): > Non-MyRocks Server: Features in the mysqld server that were not related to our MyRocks storage eng

I'd be interested more in what features were in their (3): > Non-MyRocks Server: Features in the mysqld server that were not related to our MyRocks storage engine were ported. i.e. things that they haven't shared with the MySQL community but aren't related to the storage layer. Why would/should they keep those private? Considering that RocksDB is open-source, clearly it's unlikely it's because they're 'trade secrets'.