Facebook, nearing 20, has 3 billion users. Many of them are old.

Facebook says it is not dead and that it’s not even just for “old people,” as young people have been saying for years. The social media platform born before the iPhone is approaching two decades in existence. (Jenny Kane / AP)

Facebook, born before the iPhone, is approaching two decades in existence and wants you to know: It’s not dead, nor is it just for “old people,” as young people have said for years.

Now, with the biggest thorn in its side — TikTok — facing heightened government scrutiny amid growing tensions between the United States and China, Facebook could perhaps position itself as a viable, domestic-bred alternative.