Actually, there are many “convservative” religious orders in MA, especially Boston and its surrounding areas.
Observant Franciscan Friars,
Capuchin Franciscan Friars
Franciscan Friars of the Ancient Observance
Little Brothers of St. Francis
Little Brothers of Jesus
Poor Clare Nuns
MA has the second largest Franciscan population in the USA. All of the above branches of the Franciscan family are MA. The reason that you don’t see these communities is that most of them do not have men and women in parishes. It was in the mind of the founder that there be few men ordained to the priesthood and that they not serve in parishes, except in the missions. They were to be itinerant. The number of Friars who are ordained are few and those serving in parishes are not being replaced by a younger generation of friars, because of the Franciscan reform. The younger friars, ordained and non-clerical are assigned to houses where the Franciscan tradition is being lived.
But these orders do a lot of field work on the streets, with the homeless, soup kitchens, drug addicts, pro-life, contemplation, youth ministry, the homebound, immigrants and other vulnerable members of society.
The point is that the Traditional Orders are not avoiding MA. They are present. But few of them serve in parishes and most never serve the middle class. If you go into the poorer sectors of the area, you will see them waling the streets in their habits, sitting on corners talking to a homeless person or gathered in a small house that they call a friary. They are in the area and are doing great work for the local Church.
The FSSP belong to the Traditionalist movement, but they are not an order. They are not religious. They make no vows. They are secular priests who live in a community called a fraternal society. Each one can come and go as he pleases. But their number in the USA is small, so they can’t go out to many dioceses. They are wonderful society, but they are concentrated in the Midwest. They are growing. Give them time. As they grow they will be able to go into more dioceses.
Fraternally,
Br. JR, OSF