Of all time.
Steve and Marty both recognized the growing importance of digital distribution, but have no plans of putting the publisher out of the equation any time soon. "The retail channel isn't going away," Marty said, and while a company such as id has the financial means to finance their own projects, they don't have the human resources to manage a retail relationship like a big publisher does. The publisher still adds a ton of value, especially in the marketing of games.
If you do something right once, someone will ask you to do it again.