In this large Fullpower-AI study of 400,000+ nights of sleep, the data shows that heavy snoring and more serious conditions are correlated. Nearly everyone snores now and then, but for some people, it can be a chronic problem. Sometimes, it may also indicate a serious health condition. Also, snoring can be a nuisance to your partner.
Here are a couple of clinical studies for further reading:
Here is a study that links Apnea to more light sleep:
And a study showing that there is indeed a correlation between the intensity of snoring and OSA (obstructive sleep apnea):