_pj_

I don't think there is a good summary, it hasn't been settled yet. The (rather lengthy) discussion is like with everything on -hackers mailing list - https://www.postgresql.org/message-id/flat/20160812231527.GA...

I really wish the EDB guys (both Robert Haas and Amit Kapila) would mention in their blog posts about this feature that it's meant to use the pluggable storage API which is also slated for PG12. That would make it more clear that we are not abandoning the current storage format, just giving users choice (per table) to use what works best for their use case. It would also alleviate the worries that some comments expressed for both of the blog posts.