The lastStableRecoveryTimestamp field reported in replSetGetStatus contains a valuable timestamp that indicates that all data up to this timestamp is guaranteed to be in the checkpoint upon restart. It looks like we don't have a lot of testing for this timestamp today, so we should consider adding more testing. Specifically, we should test the value of the field when:

• We have a stable checkpoint that is advancing
• We have stable timestamp advancing but checkpoint does not advance
• We don't have a checkpoint but we do have a recovery timestamp
• We don't have a recovery timestamp or checkpoint