Plus the notion of "which of my ten passwords did I use for 'xyz.com?", you end up exposing your other nine passwords to 'xyz.com. Not as bad as using the same

Plus the notion of "which of my ten passwords did I use for 'xyz.com?", you end up exposing your other nine passwords to 'xyz.com. Not as bad as using the same password everywhere, but still. I wouldn't want to accidentally give my bank password to, say, a crappy online forum.