I've had this experience a few times, when a friend has popped into mind and I looked them up only to find old posts eulogizing them. It adds an extra gut punch

I've had this experience a few times, when a friend has popped into mind and I looked them up only to find old posts eulogizing them. It adds an extra gut punch not being able to actually mourn with other people because you didn't find out in time. The reality is that Facebook doesn't assume your Friends are your friends. It assumes you want to keep interacting with the same people you most recently interacted with. It also assumes you want to see things you're likely to Like or comment on. On the whole, this probably leads to them more reliably providing that dopamine hit when users check in, at the cost of being useful for actually staying in touch.