I would guess the moderators are reaching for violations years back, because real time violations are decreasing.
Nah, there are actually multiple people reporting some very old posts.
We don't even know what information is presented to a moderator before they act on a request. Maybe they don't know the post date.
We get links to posts/threads so we see post dates like everyone else.
@QS, sorry to interrupt here but I've got a question.
While you are stuck in the old-posts-deletion vortex and are interested to know why the posts got deleted by mods, I'd like to ask something completely opposite. Why can't I delete my 5-6 (even higher) years old thread(s) myself that I have created then? Is it compulsory to keep the threads even when there are options to delete our own posts in those threads? Is it also just limited to a few sections of the forum or all the boards are included?
If the threads have only your posts, delete them, edit out the OP, and report the threads so a mod can delete them. If the threads aren't self-moderated and have other peoples' on-topic replies that's more between you and them, you can ask them if they'd delete their own posts but it's up to them.