At last, I'm finished. The problem was not the book, but that I was reading it on my phone. I've been on the Epilog for two weeks at least.
Even though the story ends on an upbeat note, it's ultimately rather depressing. Two whiz-kid inventors create a whole new way to do business. It's so new, it becomes known as "New Work". So then how do you integrate that with the whole American Way: Doctorow's answer is that you don't, you can't, and corporate inertia will ensure that it never happens. Too bad - I liked the New Work.