My brother just came to visit me on Norwegians NY->Dublin route. He said when he got on the flight they made an announcement that it was their last flight for that route ever. They have already cancelled their Providence->Dublin route as well so I'm a bit bummed I won't be able to fly back to the states cheaply in the near term.
I think they had problems due to 737-max being grounded.
They were having problems before that, but the 737-max exasperated them. They even used a 787 to fill in some gaps, but that's absurd.