Agree with
@justinbieberscombover. Somewhat, he is 6 because of the crown area.
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He had a 10th hair transplant and he posted some videos like this one
3 big differences compared to OP.
1. Most important reason is OPs balding dips down the back of his head into the donor area which doesn't happen to Tillman and I believe it could possibly happen to him if he didn't go on finasteride. Looking at your crown photo from behind you have much less surface area to use as donor hair. It would be impossible to cover what Joe covered with that.
2. The sides of Joes hair are much higher, maybe ½ to 1 inch higher.
3. OP has a bad head shape for a hair transplant because of how big it is, especially the crown area. So much surface area to cover.
It sucks man. I hate to say this but I think your hair loss is even worse than my dad's. My dad is a Norwood 7 but he hit that at like 50. Probably was a Norwood 6 in his 40s and Norwood 4 at late 30s. Your only real hope is some major breakthrough in cloning or skin regeneration. If I were you I'd just shave it really short. The horseshoe pattern is doesn't really work.
I think if something like verteporfin or fak1 inhibitors become proven methods to regenerate donor hair after extraction then you could get a full head of hair again but you are looking at a long process. A gradual process to revert you back a Norwood level each 2 years.
1st transplant would be from Norwood 7 TO 6 which won't help you much but you can't just go straight to hairline, won't look natural.
2nd would be Norwood 6 to 5a which again would be a seamless transition.
3rd and 4th would be to get you a hairline and midscalp with good density.
5th to 6/7th would be filling the crown.
All hypothetical though but if the technology existed that's how I'd go about it.