I don't know, WhatsApp actually has mostly replaced Fb in my friends and family circle at least. I think it was a smart and timely acquisition (whether overpriced, I cannot say.)

> You have pictures up from all the years you been around,

In practice, people care very little about this - they want the world to know they were in the Taj Mahal last Sunday or their baby started walking yesterday, but older pictures are generally forgotten, and sometimes even a nuisance for various reasons.

> you have your friends' profiles to go check out at will,

and yet almost never do

> you can start a group,

as you can on WhatsApp

> or make an event and know all your friends are already on Facebook to see it.

This is one use case that is indeed better on Fb, though just posting and gathering replies on WhatsApp seems to suffice in 80% of cases.

(Btw, I'm not among the downvoters.)