>So, how's that "geek panic" now? Still there, huh? Well, let me try to reassure you. As a committed user of a great Mac text editor that, years ago, implemented its own version of almost all the document management features described so far, I can tell you that you get used to it very quickly. Spoiled by it, in fact. Ruined by it, some would say. Yes, it's a very different model from the one we're all used to. But it's also a better model—not just for novices, but for geeks too.
This works fine with text editors (although I'd argue that if invoked via the equivalent of "mvim" or "mate" they should discard this), but it absolutely falls apart with media creation applications. Photoshop and Illustrator files can be big, and they can take a long time to open. Just so that you can close it immediately and open a different one. Logic Pro currently does this, and it isn't nice or better. It's annoying.
Then there's the privacy concerns. If a designer is working with multiple clients, the last thing he or she wants is a different client's work showing up when he or she is showing something to a client.