A vast majority predicted including me - Ind Aus Eng SA. And that was almost the outcome except Afg upset. And even the afg ban game - could have gone either till the last minute. WI was in a stronger group- so their chances reduced quite a bit.
Each of the four semi-finalists is from a different Round 1 group, a first in Men's T20 World Cup history. This is the only instance among tournaments with a 4-group opening round (2007, 2009, 2010, 2012, and 2021) where all semi-finalists come from different groups.