pg_rewind is great, with this the infrastructure for some really great replication tools are in place - recovering a failed primary has been my biggest pain poi

pg_rewind is great, with this the infrastructure for some really great replication tools are in place - recovering a failed primary has been my biggest pain point with my repmgr + barman setup, so combined with some UI improvements (reducing the incantations needed to initiate a failover and restore a failed primary) I'd say it could be about as painless as setting up AlwaysOn Availability Groups with MS SQL Server.