I honestly don't know the quality of data that statista produces, so take it with a grain of salt. The curve does appear to be dimming towards the end of Q3 '18, but it certainly doesn't appear to be as dire as people make it out to be.

I think there's a heavy dose of IT-industry echo chambering going on here to be honest.

Point of interest: I severely dislike facebook, so not trying to justify anything on their behalf. I just don't see the idea that "facebook is dying" among any peers in any social circles I'm part of. I do wonder if it's different in the United States.

I think what really matters is something like user actions/day. Anecdotally, Facebook engagement seems to be growing down but perhaps not yet in a way that would show up as a DAU drop (which I assume counts someone with even the barest interaction with the site as "active").