Mmmm. Yeah. Facebook!?
On the one hand, if you want to stay in touch with people, especially the modern generation, then it’s possibly something you should consider. But, I think it’s communication on a very superficial level and useful for communicating trivia only. Like “Wow, a pretty sunset!” or “Dude, my dog just crossed the road.”
You wanna get in contact with me, then make the effort. You have my telephone number and know where I live!