I think Cebit in a way started as "being about everything IT", but back then that was fine, since the field was way smaller and everything overlapped more, and the sub-sections wouldn't sustain their own events. (It started as a side-event to Hannover Messe that at some point got large enough to stand on its own)
Now "everything IT" is way to broad, and the discovery aspect has moved online.
Now "everything IT" is way to broad, and the discovery aspect has moved online.