This recent @instagram change — replacing photos that you’ve
already seen from those that you follow with misc. algorithmic
trash — is so user-hostile that numerous family members who never
think twice about software UX have independently asked me what
happened to their apps.
One didn’t even notice the “View Older Posts” button, despite it
being front and center. Just that photos of e.g. his grandkids
were overnight replaced with nonsense.