One of the more exciting projects in this space is OrioleDB[0] (disclosure: supabase is an investor/sponsor). In Postgres 14 their patchset was ~5,000 lines of

One of the more exciting projects in this space is OrioleDB[0] (disclosure: supabase is an investor/sponsor). In Postgres 14 their patchset was ~5,000 lines of code (representing the total number of changes required in their fork). In the upcoming Postgres 16 release, it is ~2,000 lines of code. That means that around 60% of the code is already committed to the Postgres core. We're hopeful that these changes can provide the possibility of several new storage implementations for postgres, much like the MySQL ecosystem have with their pluggable storage [0] https://github.com/orioledb/orioledb https://github.com/orioledb/orioledb