Mike Masnick lays out the advantages of ditching legacy business models:
Big companies often get stagnant, focusing less on innovation and more on protecting a market. In the Clayton Christensen world of the Innovator's Dilemma, they focus on incremental innovations and market protectionism. And, as Andy Kessler noted in his most recent book, the innovators, who get around those things and unleash value, are often derided as thieves and criminals for undermining established business models. But what comes out of those upstart efforts is, generally, much better for the consumer. And, on top of that, the collapse of those big firms often allows many of the folks, who did have good ideas and knowledge within those firms, to spread out and to join the more innovative upstarts, which will actually implement and execute on those good ideas, rather than be stymied by bosses who don't want to undercut the old business models.
The Dish 