I soft quit Reddit last year and deleted all my profile’s comments and posts. I only kept it around because I had heard Reddit was restoring deleted posts and I wanted to make sure mine were gone for good. After several months I stopped checking.
This article made me finally pull the trigger and go in to delete my account. Surprise surprise, two pages of old comments had been restored.
It seems like the new account deleter scripts replace all comments with random text rather than actually delete them, which I'm sure makes it harder for reddit to undelete.