I prefer not to because I have better things to do with my time than to reinstall my desktop each time a new version is released. I did run a rolling release for a while but before that I ran Ubuntu and I never had issues with doing dist-upgrades and the upgrade processes seem to have gotten better over time since I first started with Linux.A clean install eliminates any problems that may exist from version to version.
Currently on running Fedora and will upgrading to the next Major release when it comes out. So why bother doing a clean install if you can upgrade from one major version to next and because everyone always makes backups before upgrading? If something breaks you can than always try to troubleshoot it or decide to do an in clean install then. Things can break during an upgrade process but they aren't guaranteed to break.