How is that different than being subscribed to [email protected] and not subscribing to [email protected]? Or subscribing to [email protected] and and not subscribing to debian-devel-french or debian-devel-portugese?
For one it's easier to browse without committing. If there happens to be no new topics in Japanese Animation I might read Spanish Animation and if I want, reply to a topic. With N mailing lists I have to commit to the entire list rather than just individual topics in subforums. In other words I have to subscribe to the "Spanish Animation" list rather that just one topic inside.
