I think that as Google became more complicated, bigger, and ML based the average Googler begins to understand the system less and less well. At a certain point

I think that as Google became more complicated, bigger, and ML based the average Googler begins to understand the system less and less well. At a certain point a problem comes up and they just don't know how to solve it that well or their bureaucracy makes solving it to painful or the people who solve problems quickly have all gone to companies where they can do that.