That was my experience as well! I guess editing is no problem, while deleting is. I found a comment I made 2y ago via websearch and it indeed got edited correctly, while the oldest comment I can find via reddit is only 9 months old; which means that comment I made 2y ago has to be way over the 1000 comments limit (which happens at the 9 months mark for me) that reddit has, but the updated script manages to scrape and edit comments beyond the 1k limit; while other people are reporting issues with deletion

edit: after further research I came across some comments that didn't get edited by the script. No idea why, as their parent comment and one of the replies to it, also mine, did get edited. But further down the chain some survived