Reform took strong hold in the mid-west. One-synagogue towns in the Northeast used to be Orthodox. In the south, one-synagogue towns were almost always Reform. Many of the small town synagogues in the South are closing for lack of membership. Those who stay assimilate.
Extended families are no longer adequate incentive to stay.
The business opportunities that brought ancestors there no longer are adequate incentive to bring in or keep young Jews. Those for whom Judaism is paramount in their lives move to larger cities where they can become more immersed in it. I've asked him to resubmit it to this list since I thought you would enjoy it. Orthodox Jews believe that God revealed the Torah to Moses, as well as the Talmud, the dietary laws, who to vote for in 1996, and the winning lottery numbers in Massachusetts Megabucks. For them, there is no such thing as change in the law, so they round off to the nearest dollar.