[Fergi]

We are about to release an open-source extension for PostgreSQL that will help with the bloat problem you mentioned here, at least for continuous updates like high volume aggregation (see: pipelinedb.com). PipelineDB will be refactored as a standard PostgreSQL extension this month. Continuous aggregation can help with the bloat problem for use cases where you only need aggregated / summary data, like realtime reporting & monitoring.