This suggests that in order to smooth the wrinkles between general relativity and quantum theory, someone would have to come along with a new way of thinking.
There's string theory but it's still unproven stuff. I failed to see how new scientists will actually solve the problem beyond having fresh new minds to look at it from a different direction.
Perhaps we don't need old scientists to die, but just new scientists.
With that being said, I think wisdom is one area that (assuming the right mind-set) can continue to grow richer with age. I think it would result in much better politicians, judges, teachers and similar roles that involve application or imparting of wisdom.