Left Facebook in 2015. Other than missing the death announcement of an old friend, I haven't really been bothered. HN & curated Reddit subs (basically Goretzky's security sub list) are more than I need to keep up with things.
I do have an Instagram account, and use that to follow the Slackwyrm comic (and ignore people asking me to give them my "desirable" id.)
I did try Blind, but quickly gave up on that mess of an app. 1 day of using it and it just was rage bait after rage bait. Maybe next time I'm job hunting - a friend stated that it was very useful for her negotiations.
Most of my WA group chats are archived & no notifications - no pressure to read them immediately. Left every group chat except close friends and family anyway.