TL;DR: even if your delete script confirms a full wipe and your Reddit profile page shows zero comment, there may still be comments left over (that you can find through a search engine and delete manually on Reddit).
Weeks ago, I used redact.dev well before the API shutdown to delete all my Reddit comments (thousands of them over 10+ years). Redact.dev confirmed a full wipe, and my Profile > Comments page on Reddit confirmed I had no comment left.
Yet, as of today, Google still returns dozens of results for “$myredditusername site:reddit.com”. It’s not just Google’s crawler lagging; when I follow those links, those comments are still visible on the Reddit website, under my username, where I have the ability to manually delete them.
Thankfully, I hadn’t yet nuked my account because I knew of other users whose deleted comments got reinstated (although that was thought to be caused by the deletion script exceeding the API rate limit; supposedly a different case, as they should show in the Profile page).
So even if your Reddit profile says you have no more comments, use a search engine and you may find plenty of leftovers.
spez: edited for clarity.
Hands down this is the right answer.
Just FYI someone else used redact.dev in the past and found that comments got missed too, see https://kbin.social/m/RedditMigration/t/46805/Strange-phenomenon-while-deleting-my-comments
Also, while GDPR archive + github reddit works out of the box, if for some reason you don’t want to wait that long or are skeptical that reddit will get back to you (perhaps you live in a place that has no GDPR/CCPA), then there is a backup method to get around this limit, using the pushshift archives available via torrent.
https://kbin.social/m/RedditMigration/t/65260/PSA-Here-s-exactly-what-to-do-if-you-hit-the