Exactly, hardly noticable problem or very noticable problem what would you prefer. If you dont like being a nw2.5 how are you going to cope with being a nw6?
The same, That's what I said, if your effected by hairloss, your effected, there are different levels, but they don't match with how far you have progressed, Who is more effected and who is less, would be based on personalities.
There are nw3s out there who never leave there house without a hat, then there are nw7s with it shaved down who never wear a hat at all, it's the person not the progression.
As for what was said as to someone who stays at nw2 or 3 their entire lives, never really progressing past a certain point, that in some cases is different, depending on the person, depending on when it hit, Variables variables variables.. Those people are quite lucky, but some don't realize it, so they have it as bad as an nw7 because they think they have it as bad.
what about age? If you start losing your hair at 40 your in a much better position to deal with it then at 20, according to the line of thinking already introduced here at least, Also considering the younger you start the more likely you are to progress to that nw7 point.
As for their being nothing to do about an nw7 well yes, this is true, there is no going back, however for a young guy, who is only an nw2 at his current age, there may be no going back for him either, since hair transplant's are not reccommended for younger gentlemen, they may as well be in the same boat as the nw7 since they are shackled to that same fate.