My brother in law didnt talk until my husband went to first grade. Stuck at home alone my b-i-l was forced to speak. Hes a mechanical engineer now and never shuts up.
You know, life is full of things to worry about. Luckily, patience is the free cure that works best in many instances.
If folks have concerns, they should have the kid checked out.
I would warn these folks though. Some physicians feel they must provide a solution. Be careful what you buy into.
Drastic isn’t the way to go until it’s to the point where it can’t be avoided any longer.