I tend to purge my account around once a year for opsec
Who came up with the idea that deleting posts is "opsec"? It certainly is not. Anything you post onto the internet is considered permanent public record. You can't "delete" things from the internet. Your comments are recorded to hexbear, any database backups that hexbear keeps, and since hexbear is federated, every other instance could have records of your posts.
People who delete their accounts make the website worse. Sometimes people search through old posts to learn things, check to see if questions have answered before, or for previous news articles. People deleting these posts make the website less useful.
If you feel the need to delete your posts, your opsec has already failed. Opsec only works if you never say things that could damage your security. The adage is "Loose lips, sink ships". You can't put words back into your mouth.