Valid point, but I think it's worth looking at the potential benefits. The thing I always hate about writing is that I'm constantly saving copies off to the side. At the very least I would think snapshots would be invaluable, but once you have playback, you basically already have snapshots with high granularity.

While solutions like DropBox or Sharepoint allow versioning and collaboration it's at a higher level. Maybe I've been spoiled by VMWare, but I love having branches of specific versions to fall back on and test things out. Why should writing be any different?