Let it be... I like 'em big... :-D
But you're right... There must be a limit, and personally, I don't believe that they can get bigger than this, but I can be wrong...
I just think that a container vsl isn't like a tanker, where size doesn't matter [much], because a ULCC could unload to a smaller ship or to a pipeline [or however it's called] in open sea.
Don't know why, but I can't imagine the same happening to a container vsl... 8-) :-P
brgrds