It's getting close to 2 years doing high raw Paleo for me. I've lost some more hair, but the rate of hair loss is much less than it was before I went LC cooked Paleo years ago. The rate of hairloss seems to have remained pretty stable over the past four years or so, with slow continued hair loss. During the past couple years, Matt Stone documented with photos much more dramatic hairloss than I have experienced during the same time period. The irony of this is that he claims his diet advice prevents hairloss and attacks cooked and raw Paleo as promoting hairloss, whereas I have only reported my experience re: hair and other factors and haven't made any claims about it for others.
What has improved greatly in recent months while on raw Paleo is my dandruff and hair quality. I have found that raw fermented honey and artisinal mead dramatically reduce my dandruff and eyebrow/forehead skin flakes and if I stop consuming them, then the flakes return. Also, when I eat fermented honey foods, my hair feels a bit thicker, softer and less greasy so that it's more pleasant to run my fingers through it and it needs less washing. I'm hoping to be able to make home-made mead so I can make a raw version of it, which is apparently possible per multiple sources.