Dec 8: Building on top of Flexible Paxos (which Accord also references in quorum reconfig section), Relaxed Paxos explores ways to optimise further than FP (which states that only intersections between the leader election & replication phases are required, not between all quorums), and skip a round when deciding on the already-proposed values. These results are very useful for ones implementing Paxos in the industry: "Relaxed Paxos: Quorum Intersection Revisited (Again)"