Slate has rolled out a rather morbid tool for calculating the odds of freshly vacant seats on the bench:
Using publicly available data from the Centers for Disease Control, we can get rough odds for many different scenarios. It's rough because it assumes, to put it briefly, that Clarence Thomas has the life expectancy of the average 62-year-old black man. Which is likely not true. But it is true that with four justices in their 70s—and Ginsburg turning 80 this year—this Supreme Court is one of the oldest in a long time.