I don't see the point why distros, instead of building new versions, don't have a unique version, which continously provide upgrades for the linux kernel, desktop environment, software packages, etc. Everything seems to be upgreadable in a distro version to convert it in the following version. Clearly I am missing something.
For instance, new distros' versions release notes feature new software versions, like gcc or gnome, but they could have been upgraded in a previous version, so what is the point?