Here is the BIG misconception on this subject that gets everyone in trouble.
Throwing the lag away (casting) and unwinding it earlier are two COMPLETELY different motions. Most people think they are the same.
One involves a break down of the left wrist which cannot be fixed by “holding the lag.” Shorter back swing, keeping upper body behind ball, etc., is how you get rid of that “loss of lag.”
The other involves connecting the clubface to the turn and having the club rotate with the turn from the top of the down swing.
When you try and hold the lag or create more lag, you disconnect the rotation of the club from the turn and cause more issues than you can count.
It is a totally irrelevant discussion.
When you make a good swing, you get X amount of lag. If you try and create it, you get X on the scorecard.