What if the Seljuks had been stopped from establishing the Great Seljuk Empire? Suppose at the Battle of Dandanaqan in 1040 (https://worldhistoryproject.org/1040/5/23/battle-of-dandanaqan) the Ghaznavids defeated the Seljuks after one of their leaders (the grandchildren of Seljuk himself) was killed. Besides the lack of a Sultanate of Rûm, how would the rest of the Middle East fare? Would the Buyids have lingered on? Would the Ghaznavids have been more successful?