imo, just shows how much more evenly matched different teams are at international level... compared to 15-20 years ago.
Quick look back at 2006 you had 11/32 teams that failed to win any of their games
This year you've got 5-6 max., and that's only if Serbia and Cameroon lose later. Could be as low as four, and then 28/32 have won at least once.