[development] _drupal_wrap_mail_line()

Before drupal sends an email, the content of that email is wrapped to lines of no more than 77 chars. I can't think of a single good reason to do this. I wouldn't use an email client that did this, and I don't want my drupal to do it either. It causes problems: http://drupal.org/node/348327 http://drupal.org/node/321026 So what am I missing? Can anyone tell me why this "feature" is in there? Thanks, -Dave