The Covenant of Moses was closed at the Cross. In that sense, God today holds no one accountable to the Law of Moses. We keep it around, referring to it historically, so that we may learn about His Laws in general. Moses was a specific example and application of the Covenant of Noah.
Noah is still in force today. All human governments are bound by it, measured against that standard. Because the Decalogue is rather general in nature, we can see it as a reflection of the broader standard of Noah. It’s not a waste of time to continue citing its provisions.
On the mystical level, what we can learn from it is most assuredly binding on every believer in this world. It helps us grasp the nature of God’s mind regarding things.
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