

Instagram - posts can still be checked in a browser without logging in. Imginn exists too if you want to browse a profile.
Facebook - Anecdotal, but I have not had a Facebook account in 20 years and I can safely say I’ve never once had FOMO or trouble finding information on an event. If it’s a private social gathering that’s worth going to, someone will invite me.
















There is with Reddit! If you browse enough old posts you’ll inevitably come across a profile who’s history entirely consists of “I’ve quit and gone to Lemmy”.