I got my lower winsdom teeth at the age of 15 already, took an x-ray and discovered i had upper ones too but they came out till 3-4 months ago and i'm 17. Doctor said that the lower ones pushed a bit my front lower teeth so i may get braces but it's not needed - it's not a disaster and it doesn't show out anyway, but if i like to fix the lower row, then i would have to take out one tooth and bring all other teeth together with braces, so the row would be straight with no spaces, i could do that shit whenever i want to, but if i'm older, then it's gonna heal a bit longer and i would have to wear braces for a longer time.
But if my doctor said all this shit isn't necessary, then i'm not gonna do it.