I got in on reddit super early. Every few weeks I get a message from someone referencing a comment a decade old, now either featured in some youtube video or coming up in their google search. It’s unnerving shit and I check my politics there a lot more than I do here. Just as a matter of user safety it’s good that our posts disappear after a month or whatever. Maybe it’s eventually a few months or a year, but if we ever return to the normal model of forums preserving everything forever it’s a big infosec risk.