A general description of the proposed change and reasoning behind it is on GitHub: https://github.com/LemmyNet/lemmy/issues/3697
Linear execution of these massive changes to votes/comments/posts with concurrency awareness. Also adds a layer of social awareness, the impact on a community when a bunch of content is black-holed.
An entire site federation delete / dead server - also would fall under this umbrella of mass data change with a potential for new content ownership/etc.
Question… user ban, are moderators doing the remove data option? The API seems to allow it on a testing server install, but I don’t know what moderators are actually doing in the field.
That ban removal is another potential high I/O operation. There are accounts that copy postings in mass off hacker news, Reddit, etc. And I could see banning one of those accounts triggering a lot of PostgreSQL activity.