Over the last few years, I’ve become something of an open-source triumphalist, drifting to the conclusion that (on the engineering side) it’s the best way to build software and (on the business side) it’s a better way to monetize it. I have to confess that Adobe Lightroom has kind of shaken my convictions. Certain elements of its UI and design (for example, the crop/rotate tool, and the nondestructive editing paradigm) are qualitative steps forward in the state of the art. Furthermore, I can’t think of a single good business reason for Adobe to open-source it. I guess the conclusion is obvious: for the foreseeable future, both models of software building and marketing are going to march along; neither is doomed.