I recommend reading this article by Shawn McCabe of Acro Media.
Today I was listening to Talking Drupal #168. The topic was how to ensure that open source project developers can afford to provide updates to their users. As an open source developer myself, I have to disagree with the premise that we should support a distinction between users and developers. The projects that I develop for are the projects that I use. As a user-developer, I do not care how many users a project has. I care how many user-developers it has.
I set up Dreamhost cron jobs to run
drush cron for two different sites running Drupal 8.0.3. One of the cron jobs worked, but the other failed with a syntax error. Drupal 8 requires PHP 5.5.9 or later, and the default version of PHP for one of the sites was 5.4.42. Changing the default PHP version in .bash_profile and .bashrc did not fix the error.
If you add a private files directory after installing Drupal 8.0.3, you will get a warning on the status page saying it is not fully protected and to see https://www.drupal.org/SA-CORE-2013-003 for information about how to protect it with an .htaccess file. The message shows up even if the directory is not Web-accessible. Ignore it. The .htaccess file will be created automatically after caches are rebuilt.