Interesting! I think it's because they're more "established." Personally, I have mixed feelings about the old-fashioned name trend. Some of the names are amazing, while others are not my thing.
I love:
Anastasia,
Charlotte,
Cyrus,
Genevieve,
Emma,
Flora,
Isaiah,
Jasper,
Josephine,
Iris,
Isabella,
Isabelle,
Luna,
Milo,
Silas,
Sophie,
Violet,
VivianI hate:
Alice,
Amelia,
Daisy,
Eileen,
Eleanor,
Hank,
Hattie,
Mabel,
Nora,
Ophelia,
Otis,
Sadie,
Sebastian (obviously),
Willa,
Winnie