Return all messages set by drupal

The function editablefields_view() has an area that returns messages set by drupal_set_message() only if they are the default level of 'status'. Is there any particular reason this design choice was made? It would seem that 'warning' and 'error' level messages would also be pretty important for an end-user to be made aware of whether or not their change took place and what potentially went wrong.

Original:

<?php
  $messages = drupal_get_messages('status', TRUE);
  if (count($messages) > 0) {
    foreach ($messages as $type => $messages) {
      foreach ($messages as $message) {
        $output .= '<div class="messages ' . $type . '">' . $message . "</div>";
      }
    }
  }
?>

One solution:

<?php
  $messages = drupal_get_messages();
  if (count($messages) > 0) {
    foreach ($messages as $type => $messages) {
      foreach ($messages as $message) {
        $output .= '<div class="messages ' . $type . '">' . $message . "</div>";
      }
    }
  }
?>

Optimal solution that AHAH uses:

<?php
  $output .= theme('status_messages');
?>