I think a lot of that has moved to WhatsApp - at least here in Germany people create and participate in groups for all kinds of social circles and activities:

I think a lot of that has moved to WhatsApp - at least here in Germany people create and participate in groups for all kinds of social circles and activities: From never ending, ongoing groups, like family, friends, clubs / sport teams or work to temporary and occasional groups dedicated to events like birthdays, travel with friends, festivals, etc. The concept of groups is easy to grasp and it's much simpler than organizing Facebook in a similar way. It includes people who don't have a Facebook account (all they need is a phone number and even grandma can join in) and participating feels much less public than posting anything on Facebook. Of course I imagine Facebook won't mind that transition and development all that much.