If I see a new feature in Firefox is going to appear in Firefox 8, to me, version numbers are just out of control. In that case, reducing the relevancy of the version number makes sense. But I feel that, and I'm sure many developers feel the same way, if a software is not rewritten from scratch but instead is incrementally updated, that the major version number shouldn't change. I prefer Firefox 4.123 over Firefox 11.
That's just not the way a LOT of software works these days. For example, what version is facebook on? Do you know? Does it matter? What version is gmail on?
Chrome users only know what version they're on if they go and look at "about" but features are added all the time. You can't even find the chrome version number on their website--at least, I couldn't.
Linux changed to version 3.0 for no discernible reason. Emacs jumped from version 1 to version 13; versions 2 through 12 just didn't exist at all. Did it matter? No. It's just a number.
