Some of those hairs are just such a visible WTF that you don't even bother downloading them. And the true horror of some of the others doesn't manifest until you get into CAS or BodyShop. The gonads it takes to make people pay for some of that crap is staggering. I mean, Nouk's hairs are never obviously gappy, and the few gaps I've found are at odd angles. And those are all free hairs!

Oddly, Archie's hair, which seems to be based on a base game mesh, gapped really badly when he was a Teen, but less so as an Adult.