I should also mention that a great virtue of quorum-based protocols (for majority or basic read/write quorum systems) is their ability to mask tail latency/tran

I should also mention that a great virtue of quorum-based protocols (for majority or basic read/write quorum systems) is their ability to mask tail latency/transient faults. That is difficult to replicate in sequential protocols and is a good reason to use quorum protocols in high/variable-latency and otherwise unreliable environments like geo-distributed databases.