Dr. Feller, a HT is NOT a cure by any means.
Most people's donor hair thins with age, and some, like my grandfather, lose all their donor hair by the age of 65.
Moreover, the place where you move the HT donor hair to will thin even if you take Propecia (which, by the way, you were against at one time), so at best, a HT will give most NW5's 10 years of being a NW3, or give most NW3's 10 years of being a NW1 or something to that effect.
Please don't make overzealous overconfident statements all the time as there aren't many women to try to impress here.