My guess is that if they now choose to change of director for every other film, it's just because you can't really change the formula, you can merely try to film it your way.
“The temptations are great to simply retreat to the domain of private life and give up on our public problems.”
“I look back on it, yeah, I'm in a much worse financial position than I was eight years ago. I'm going to have to go out at age 62 and kind of readdress some of that.”