PostgreSQL 9.4 has introduced JSONB, a structured format for storing JSON, which provides many users with the new opportunity: an effective storing and querying JSON documents inside ACID relational database. While users have notice a great jsonb performance, their feedback also reveals some hidden problems with current jsonb implementation. We want to discuss different approaches to resolve aforementioned problems and present several proof-of-conceps, so we could rethink jsonb for 9.6.