My understanding was that reddit only kept the immediate previous version, not all historical versions. So if you just edited or deleted your post, they could restore it from the backup (if they wanted to). But you could edit your post to, say, “eff spez and eff reddit”. And if your edited or deleted it after that, the only thing they’d be able to restore it to would be “eff spez and eff reddit”.

That’s my historical understanding anyway, they could’ve changed it in the meantime.