My whole family was born in Halab or Egypt and NO ONE wore a wig there. When they came to NY and became educated about the Halacha of a woman needing to cover her hair after marriage,THEN they took upon themselves to cover their hair,some with wig and others with hats. Even rabbis wives in Halab didn’t cover their hair there. They always knew of the Halacha but for some reason it just wasn’t kept in those places.
I know that the rabbis in Brooklyn that are Hacham Ivadia Yosefs talmidim are against wigs very strongly. Their wives wear hats.