Let users know to to expect new posts, where to find updates moving forward, and explain to followers why they are leaving.

I get that many people also want to make a social statement, but there are still many legitimate reasons to communicate something if you have followers.

Social coordination and posturing, same reasons anyone announces their participation in a movement, and let's be clear, leaving Musk Social is a brewing movement

Be it hereby made publicly known that I have no intent to post a response to your comment.