Is It Humbling That Facebook Is Developing Services for Other Platforms?

Facebook CEO Mark Zuckerberg talks about how the last year or so has been humbling for them. He also says that if we all work at it, all of us can reach a billion people by the next decade. So far there's only been 16 million verheadseads sold ever. But you could look it like how quickly phones went from ye except smart pones were useful in very obvious ways.