Drupal upgrades have not been easy, and they should be easy. You look at wordpress, one click and the upgrade is done! Plugins, themes and core can all be upgraded from in the browser.
Drupal upgrades are traditionally backup, move all files out, extract new fresh files, move selected files back. Now there is an easier way! Patch files from http://fuerstnet.de/en/drupal-upgrade-easier allow you to backup, and then inplace upgrade the Drupal core files! No nasty moving things around that is almost guaranteed to break something because you forgot to move something back.
I still look forward to the day when Drupal upgrades are as easy as Wordpress. Until then, I have a good enough method!