[development] The dawn of DB locks

Hi, Today marks the end of explicit database locks issued by Drupal core. Thanks to David Strauss who helped me getting rid of them by patching cache_set and variable_set in http://drupal.org/node/55516 . Now, do we want to keep db_lock_table ? In Drupal 6, likely yes. In Drupal 7? The question makes sense even if go over to PDO. Regards, NK