If you strictly follow the Norwood scale NW7 is when the horseshoe is really low like in Ballmer:
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Though also worth noting is that NW3 in the scale is when the recession goes all the way back to your ears, which is not super common in most people who are called NW3 (like me).
Haven't seen NW8 being an official thing, although I have seen people with extensive thinning on the sides in front of and around the ears, I remember the user
@Catagen posted a pic of some guy who had gone slick bald in that area, so I think that would be a proper NW8 imo.
Yeah it's a tragedy that male pattern baldness has to be so extensive, if it had to exist I wish it stopped at NW2-3, then you could just get one or maybe two transplants and be set for life, or you could live with it just fine if you didn't want to get surgery. But no, can't have nice things. Or if male pattern baldness had to be extensive it would have been better if it was inverse so we went bald at the sides and back and kept the hair on top.
Ikr, it's amazing he got to how he is now, especially considering he had two awful butcher transplants in the 1990s.