JSON is the most popular log type used by Loggly customers because it makes it relatively easy for you to benefit from automated parsing and analytics.
JSON support is the most interesting new Postgres feature of the last few years. It relaxes the primary constraint of SQL databases — the rigid schema structure — by letting you store semistructured data in your tables alongside other data. It also decisively counters the NoSQL trend by giving users document store-like semantics in a proven, mature database technology.
With new SQL server, you can have the best of both worlds. In your data models, you can choose when to use traditional structures and when to introduce NoSQL concepts.