I've missed social events in the past and then bumped into someone and they've said something like 'why weren't you at x? Didn't you see it on social media?', nobody asked me directly, so i wasn't aware / didn't go.
Some acquientices and a few friends have a group chat, they meet up about twice a year, but all year round they are posting memes and general nonsense, mostly from the people I barely know, so i put the chat on mute, but then I miss out on the meet ups i've attended for many years, since i didn't even know they where happening, it's just assumed everyone is reading the thousands of messages and huge intrusion of time from everyone all the time.
I feel like it's altered the very way we socialise and not just that, they way we learn about new stuff (most marketing is social media or internet based these days).