[jrbapna]

Facebook didn't capture "everyone" until many years after it launched. It was limited to college campuses, and popular amongst college students.

Whatsapp replicated this growth and captured an even wider net. Especially outside of the US.

Agree that Facebook is far from irrelevant, but I'd keep an open eye on the hip new platforms. In the attention marketplace, the past is irrelevant. All that matters is the present, and the now. The network that captures the highest level of engagement wins, and amongst certain demographics, Facebook is certainly losing its relevance.

[dave2000]

Facebook isn't exciting, like telephones aren't exciting. They're both something you use when you need to. It's kind of boring reading about how Facebook has peaked, or it's over, etc. What's to say? Just because the trendy/new/shiny phase is over, doesn't mean it's "losing it's relevance". People still massively use it to arrange events, or talk about them afterwards, share photos, chat etc.