Edited with Power Delete Suite - https://github.com/j0be/PowerDeleteSuite

I do this every few months, scans the page, makes the changes. You can see with my account https://old.reddit.com/u/thermal_shock

Been about a month, will probably run it this weekend. Surprising I've only been blocked in some subs, no ban even though I said they all the billionaires should be killed lol

There were tools to do it for your... but after the massive migration they blocked a ton (part of the API block that drove everyone away)

if you google how to do this, you can find some threads, i used a github library that did it pretty easily with a step by step walk through, some let you edit it and fill with quotes or advertising or whatever.

I personally manually overwrite my comments every few months. Be aware, though, that you can see only the last 1000 comments in your history, so you'd better do it frequently if you are very active. I haven't seen any of my comments ever restored, unlike what I hear from people who use automated tools.