Collider says:
There were recent concerns that FOX would not be renewing the “longest running scripted series on television” The Simpsons due to an impasse in negotiations with principal cast members. Rest assured that the network’s flagship program will now remain on the air for another two seasons, bringing the total number of episodes to 559. There is no word yet on just what concessions were made on either side of the bargaining table or if the 25th season will indeed be the last.
well 25th is a good number to end the show
just end it already, the longer they continue the more they tarnish the name.