I personally just appreciate a story spanned to such a big chunk of a lifetime like that. That is why I loved Once Upon a Time in America too. Having a director who slowly tell the story of an individual and really take his time with the character or characters. I feel like this is how most stories put on film should be like. Tell me a story. Visconti's The Leopard was like this too. Just epic, beautiful, great acting and you are given time to seeing characters develop. And TWBB is the only one Paul Thomas Anderson movie that I love because of this, it is my favorite style of movies, it is Cinema in its purest form.