[chmod775]

> there very much is a social expectation that you are reachable on them

I disagree. People will (somewhat) expect you to have a WhatsApp in many European countries, but hardly anyone will expect you to use Facebook.

At least in my circles Facebook is a wasteland. Many people haven't even posted anything in years, and if I was trying to reach anyone via Facebook I'd settle in for a long wait - until they check it in a month or two.

You won't notice it if you just open Facebook, because Facebook will fill your feeds with people who are active, but when I go through my list of contacts there it's obvious less than one in five are still actively using it.

I don't claim total knowledge of the situation everywhere, but I do keep in contact with people of a lot of different countries.