Well, I moved over the last years across several time-zones and continents. There are people that I knew back then and lost contact now. Do I care if they got babies, found a new job, like/dislike Trump, or are doing Toga on the beach ? No, I don't. I moved away. Having that knowledge does not make my life better or worse in any way. I can get the illusion that we are still in contact, but in reality I will never move back to these places. So why should I care?