EDIT: My overly clever pithiness that doesn't add to the discussion stems from having seen too many similar posts for every social network or mobile app since the early 2000s. Any service that relies heavily on everyone buying in will eventually lose steam, in part for cultural reasons[1] and also because other companies find areas where they can improve and desires that hadn't been tapped yet.
So, for a big social network to survive for decades and become an entrenched part of everyone's lives, it has to become like infrastructure. I suppose one way to do that is to continually buy new hot companies, as Facebook did to Instagram. Instagram too shall pass.
But when I read the headline, I did wish her friends were just finding new interests, and the new interests were taking too much time and leaving none to spend on FB.
[1] Imagine that Seinfeld was still being produced to this day.