My go-to example is that we have run into similar things with the pace and volume of "Science". For a long while one could be a scientific gentleman and keep up with the sciences. As a whole. Then quite suddenly, on the other side, you couldn't and you had to settle for one field. And then it happened again: people noticed that you can't master one field even, on the current side. And you have to become a hyper-specialist to master your niche. You can still be a generalist - in order to attack specific questions - but you better have contacts who are hyper-specialists for what you really need.