Still, the conformance clauses are some of the most decent in MQTT5 compared to many specs!

In spite of all my previous comments on COnformance, the conformance section in this specification is fairly decent ! The conf section job is greatly facilitated by the well worded normative statements with clear assignment to the conformance targets. All my previous comments were tagged "minor" (I think) - they are not critical and should not warrant by themselves a new review cycle. But should be fixed if an opportunity shows up. Several (and maybe all?) could fall under editorial - non material - changes (e.g. the one about renaming "Conformance clause" section and bringing up the functional definition of conformance targets.). Good job to MQTT editors!