This too! In fact, a whole series can be done on hair growth vs. retention because a lot of women really don't understand the difference between the two. We're so used to saying "my hair isn't growing" when we don't see it getting longer, but the truth is that we're not retaining the length. I say that a whole series can be done on it because growth and retention is directly related to product usage and healthy hair care practices.
ITA, I think you could also tie in how our hair grows at pretty much the same rate as any other race! I think that would be quite a new concept (and probably revolutionary type stuff lol) to those outside hairboards.
Oh and if you want to do the 5 Online Natural Hair Stars one, you could include Sera252.