I'm 36 and had my first strip procedure done at 25. I've had two more since then and my scar ended up about the same each time, which is basically 1mm or slightly more than that on the left side. As far as non trich closures go, it couldn't have been much better. The scar was never an issue until recently. I'm very satisfied with my hair transplants, but as I get older, I just prefer to have a short, very low maintenance hair cut. With clipper #4, my scar is undetectable. With a #3, it's essentially undetectable, but that's where I start to notice. I taper my hair in back anyway and it works for me to use a #2 up until just below the scar and then use a three from there. All of this said, I'm done with the hair restoration game. Monday, I had 200 fue placed in to my scar and realistically expect to be able to shave down to a #2 over the scar with the obvious appearance of a linear scar to be very minimal. I still use Propecia every day and use Rogaine foam twice a day too. Over time, regardless of my Propecia/Rogaine regimen, my crown will probably thin a little if not quite a bit. All the more reason why being able to clip down a little shorter is important to me.
Had I not already had three strip procedures, I may have opted for a trichophytic revision of my scar, but didn't want to risk a wider scar, even with hair growing through it.