Comment by MyPasswordSucks

Part of the disconnect is that these days, a lot of the Facebook use is concentrated in places you don't necessarily see from the outside.

Like, fifteen years ago, if you happened upon the Facebook page of a random person, you'd usually see a handful of vacation pictures, a meme or three, some updates from their latest Clash of Cookie Farm Kitchen Dash session, and whatnot.

These days, all that stuff - if it's even still being posted - is likely siloed away to Friends-only posts. That random person might still be there, might still be logging in every day, but you don't see the Messenger group chats and the Marketplace offers/haggles.

Likewise for small businesses - a lot of the "look at this thing we're selling now, come check it out" posts now go to Instagram. They might still be auto-logging in, still responding to PMs on Facebook, still clicking a few news posts here and there, but that's just not visible on the outside, and creates the perception of Facebook the Ghost Town.