[nicolas_t]

We're making the opposite choice, my wife speaks Cantonese to our kid because we believe it's worth preserving (of course, the fact that there are a lot more medias in Cantonese than in Hokkien makes it easier to preserve).

Of course Mandarin, is more "useful" in a purely pragmatic way but languages are social things, they're tied to culture, they help create relationships with other people who speak those languages (I have plenty of Teo Chew friends who have made very good friends with others from different country because they are kakinang) and speaking multiple languages is always worth keeping.

Plus even besides this, having a multilingual home, regardless of the usefulness of the languages that are spoken, is associated with a lot of cognitive benefits for children so the thousands of hours learning a different language are useful.