Correct, hakohen.
Those parents and grandparents who did not want to pass Yiddish on were the assimilationists and compromisers – even among the frum – in EY and the US.
My friends’ parents and grandparents lament how badly the generation after us will speak the language that they held on to even in Communist times when the Jewish Commies tried to remove any kedusha from it.
However, as Lipa becomes more popular and others like Beri Weber start singing in simple, Americanized Yiddish, a new Yiddish revival may take place.
Regardless of what the world speaks, we Jews have our language(s). Ivrit is a misbegotten and deformed child that may die out due to English being a necessity for anyone in the medine to succeed. Some type of Yiddish will always be around.