Yiddish is a dying language and its not clear that anyone here has provided any reasons to extending its life one more day than necessary. Between English and Hebrew, or the lantive lanuage of whatever country they live in, Yidden do not need any other lashon. The time spent learning yiddish could be much more usefully spent in limudei torah.
To Apushetayid: Much better to have that hybrid English than to have some native Isreaeli mumble “yashar, yashar” in response to your request for directions.