It doesn't matter that you are getting more users if those users are old and that's basically what is happening to Facebook. FB these days is just a place where content gets recycled, original content, viral memes and cultural trends happen elsewhere (TT, IG, etc). Just try to list the number of public figures (that young people care about) that use FB as its main channel? Now compare that against TT, IG, etc.
FB managed to buy IG and WhatsApp but they won't always be able to buy their competitor or copy them
FB managed to buy IG and WhatsApp but they won't always be able to buy their competitor or copy them