OldVersion: Is the latest version of the software always the best?

Is the latest version of software always the best? At least, enthusiasts of old software versions on OldVersion.com don't think so. They must have their reasons. A simple example is Vista (if we consider operating systems as part of the software category, why not?). I remember reading about a foreign Windows 95 enthusiast who still insists on using his "beloved" Windows 95 even to this day, which is admittedly extreme but also indirectly shows that old software does indeed have certain advantages in some areas.