The trend is moving towards private chatrooms (whatsapp, telegram, slack, messenger groups). People are tired of public social media.
Even as a pretty public twitter/fb/etc person, I'm finding that my social activity increasingly happens in private and semi private chats. For most of my friends, they use chat groups exclusively. The only times they post on Facebook/Instagram publicly is when they need to brag about some semi-big event.
Instagram Stories are popular tho. They seem to have mostly replaced the old casual personal posting.