I just ran Power Delete Suite on all of my comments and self posts, stating they have been removed in protest.
On July 1st, I am deleting every comment and post, then closing my account. Reddit was fun while it lasted.
The fediverse is still raw, but I see massive protentional here, and I am ready for this journey with all of you.
I think they would just use the normal account deletion procedure, so all comments would still be there just with a “deleted user” user
sadly the best way I can think of is just doing it a little at a time manual edits/deletes. or restricting it to be only like 300-400 posts at a time. but honestly reddit is probally just rolling back everything within x time because I was also re-logged in after logging out on all devices the night prior, which tells me they likely ran a database rollback and then migrated new data over the old data.