I don't miss it at all. Not one bit. It amazes me how much time my wife spends mindlessly looking though stuff on it and the negative feelings that sometimes flow out from it.
I recently read a truly fantastic speech by Charlie Munger, which imparted so much clear & concise information in an easily digestible way that I could instantly relate to, it made me realise just how little I know. Specifically, he mentioned that you really need to notice when technology is going to help you and when it's going to kill you. It's made me re-evaluate my current relationship with technology and how negative it can be at (most?) times. I hope over time, people start to question their relationship with technology a lot more. I already see hints of this with mainstream media in things like Black Mirror.
I am amazed at the quantity and quality of some of the content on something like Kahn Academy that I have no idea why I haven't made more of an effort to try and grasp topics that otherwise are completely alien to me. Many of these will probably help hugely in my day to day life as well.
Recently I listened to an interview with a UK fund manager called Terry Smith, who said they don't invest in tech shares like FB, Netflix, etc. as they are such new areas which are still open to such massive change. Long term (decades) they probably aren't safe bets i.e. Netflix is great now, but once upon a time so was Blockbuster.
I do wonder if "peak" Facebook is over. There's already a large generational shift happening in younger demographics to things like Snapchat, etc.
I do hope that whatever may or may not replace it has a better balance towards positivity.