I honestly think they fixed this issue for many airports, because before SU6 it drove me crazy that every airport had these horrible flashing white lines, especially visible at dawn/dusk/overcast. However, after SU6 I’ve only noticed them at the US airports that I’ve checked out, as well as many of the handcrafted airports, even outside the US like Frankfurt. Otherwise, I seriously do not see these lines anywhere else at airports, under any lighting conditions. (Water tile cracks I definitely do see).
Now, on the SU6 patch notes they included a description that said “fixed some gaps between ground surfaces” and I’m thinking this is what they are referring to. Maybe the remaining anomalies will be ironed out, maybe even by tomorrow!?