I think you might be letting perfect be the enemy of good. Certainly there's a lot of improvement remaining for version control. Ideally everything (files, database records, etc.) should be versioned automatically, but that shouldn't stop us from appreciating the good state we are in today compared to the dark years when version control for anything was difficult or impossible.
Well, I used three version control software: cvs, svn, mercurial. While I agree that the latest is better, I feel it is a bit of an exageration to say that previous to git/mercurial, versioning was difficult or impossible. Many people say git and github are the best invention in the latest years, but I don't see that it had really changed the industry compared to good ol' cvs.
