FYI: reddit orphans content. In other words your posts/comments are undeletable.

I found instances of such late last year by way of search results. I clicked a username to see more posts by that account. The only content on their profile page was a final deletion message about the API changes.

Their post history was discoverable by using " site:reddit.com" on Google. All of their posts/comments still show up under their username instead of the normal [deleted]. Clicking the username takes you to their empty profile page.

So what we know from this now is that reddit has been saving original submissions. Whereas before their claim was that only the last edits are stored. Which is why the deletion scipts became a thing. People took it on good faith that we could delete our posts. At some point they stopped doing that. Or perhaps it was all a lie the whole time. Who knows.