POD is Murad IV doesn't die prematurely at 28.
Would the Ottomans have taken advantage of the Deluge in some capacity? Would they seek to conquer Vienna as the Austrians would have their hands full with the 30 Years War, or would they have taken a more reclined position?
He would hardly have been able to take advantage of the 30YW, also because for most of his reign, Murad IV had been busy quelling revolts in rebellious provinces or fighting on the front line with the Safavids or strengthening the border from possible incursions coming from the PLC regions, certainly he might want to support any revolts against the Habsburgs or weaken Poland, but I hardly see him trying to launch a new military campaign immediately after having obtained a difficult peace with Persia, without forgetting that a possible conflict aimed at taking Vienna will see Venice and Rome immediately took sides in support of the Austrian Habsburgs, creating the conditions for a very costly and inconclusive war ( which could quickly spread to the Morea and the Aegean, given that Venice and Spain had an important local network of supporters, always ready to rebel against Constantinople if the occasion arose ) finally it should not be forgotten that the Habsburgs managed to unite the main princes of the Reich against the expansionist aims of the French - Swedes armies during the last decade of the conflict ( thanks to the contractual skills of Ferdinand III ) , therefore it cannot be excluded that they could do the same in case of Ottoman aggression
