My memory is hazy here, but I believe in one of the 7UE quests there's some indication the Elementals knew exactly what Dalamud was and why it was so dangerous. This would, of course, give the general impression that Elementals retain a cultural memory much longer than spoken races (which shouldn't be surprising as Amdapor was more or less erased after the 6UE thanks to them)

(I'm also not sure cultural memory is the phrase I'm looking for, but we don't have a lot of information about Elementals so I'm at a loss!)