DH didn't snore enough to bother me until a few years ago. It got louder. I made an appointment with a specialist immediately. No way I was going to go through that for years. He has a simple operation and went back to sleeping normal. It took exactly one month from first loud snoring to end of loud snoring.
Any loud snoring is not normal. Snorers need to go to a specialist and find the reason for the snoring. It's harmful for the snorer, their bodies are not getting the the right kind of rest it needs and that can cause many other problems like depression. Parents listen to you teens while they sleep to see if snoring is heard.
My brother snored, not too loud but annoying. The family Dr. kept saying he was fine. His snoring was getting worse. A specialist and a sleep study later, he has an oxygen machine and says he feels 100% better and he's a happier person.