I'm 34 and have recession on two symmetric molars on my upper jaw. Surgeon thought that was strange. I couldn't help but notice that those teeth were both used as anchors when I had braces 20 years ago. They had a large metal ring around them. My teeth appear to be fine otherwise. Imaging shows no problems with the roots, despite not being treated for so long. Still, my dentist says I should get a graft just in case.
As for my other teeth, I've had 4-5mm pockets in a few the past 1-2 years but in my last visit they all decreased to 1-2mm. I didn't think that was possible but ok I'll take it.