I explain it on the thread, but I have health records for disease outbreaks where the version is very important never to delete. The copies end up being stored amongst a few countries and Health partners. In some situations, countries can’t be trusted to archive or not alter records as it could be politically sensitive (eg, “maybe we just edit the db to say 10 cases of disease X is really 10 cases of disease Y.”). Or prevent situations where one site accidentally deletes some records, but not all, and it isn’t caught for weeks later where there have been other adds and edits over the time. Figuring out the restore was really hard. Being able to immediately detect changes across all nodes is valuable.