Fully recognising that you said "IMO", I'll say that keeping up with acquaintances and people from the past is normal in my culture. Social media helps to make that more direct and easier to manage than the gossipy grapevine of yore.
What's normal depends on your culture and context, of course, and I suspect that's not true in yours — but it is in mine, so ditching something like Facebook is just out of the question for me and many people whose cultures place a heavy emphasis on those connections between people.
The middle ground for me has been to check Facebook less and less, accelerated by the algorithm delivering me fewer life updates and more slop reposted from reddit.
