I've always wondered why there's such an extreme aversion for OSS to go to version 1.0, or to roll over to any major version, when commercial software has no problems going crazy with the versioning?
I want to believe that serious devs, OSS or otherwise, would be thinking about something along the lines of semantic versioning (http://semver.org/) as they bump version numbers.
Additionally, marketing likes to see the major number change (the "X" in the X.Y.Z). I think the public does too. They feel like they're getting more bang for their buck.