Would the Titanic have sunk today?
It would still have sunk if it used the same navigation system and quality of vessel. Another Jack would have died again. But as you’ve already mentioned, rescue operations may be faster with airlift and signal for help from the navy and coast guards would also be faster, so maybe the number of people saved would be higher. Then again, times have changed….the poorer people used to stay in their bunks until the rich have evacuated. Now, there may not be a hierarchal system of evacuation…there might be a stampede!