How does everyone feel about Auto delete On posts older than 60 days.?

I don't think it's necessary to delete posts I would like the individual user to swipe left or swipe right to file or archive interesting posts or posts that are not interesting.

The good thing about not having auto delete is that you can search specific questions or topics from the past. I would like it if the unread posts in a thread would be at the top when you open the thread though.