We were solving fundamental problems twenty to thirty years ago. There is still much we don't understand but today we are only solving puzzles.Any one of them could have said that, scientific insecurity runs through all fields. A similar set of scientists probably had a similar discussion twenty years ago as well.
At the end they all concluded that the future of their fields lied not in the cores of their fields but in the interaction between them and other fields not represented, like biology. They probably also said that twenty years ago.