Long ago I pretty well gave up on this and update all sites manually.
Wordpress has a simple updater. I have never understood, why no Drupal simple updater.
We have had three updates in the past couple months. Drush helps of course, but you can't pass root access off to the people you built the site for.
This is not a gripe. Why Drupal doesn't include a simple version update module in the core.
If there is an updater module, maybe someone could share the information.