Redirect Drupal to non-www via settings.php
When you update Drupal core, the .htaccess file is overwritten with the latest version. This also means that any www redirects in that file are lost, and you have to re-apply them, which is annoying, and a problem if you forget to do it after updating. The reason why it is important to only show URLs with OR without www. in front of them, is to avoid what Google considers duplicate content.