This yields MUCH more information that is sometimes of great diagnostic value. Not in my opinion. But the presence of apnea per se is not predictive and is not usually a sign of abnormality. It's really necessary to specify whether one is talking about normal apnea or abnormal apnea. It is known that adults with apnea have died in their sleep in exactly the same way that babies with apnea do - in fact, it's one of the reasons why we still worry about my son dying in his sleep despite the fact that he is almost 8 years old.
Adults also have central apnea normally.
Adults and children also have obstructive sleep apnea, caused by upper airway obstruction during sleep. This condition is associated with labored breathing during sleep, snoring, and repetitive drops in oxygen level, and has been suspected to contribute to or cause sudden death in adults. I just don't think that this issue has been addressed satisfactorily. It just seems too much of a coincidence to think that there's no connection. Because all babies have apnea normally, one would expect infants dying of SIDS to have had it too, before they died.