Ah, I see what you mean now and this makes sense! I was overlooking the root dataset and probably slightly misusing the term 'filesystem' in a way that your usa

Ah, I see what you mean now and this makes sense! I was overlooking the root dataset and probably slightly misusing the term 'filesystem' in a way that your usage made clear. What I was calling a 'filesystem' I should have called 'the root dataset'. So both APFS containers and APFS volumes are like ZFS datasets. Thanks very much for the detailed reply!