It would be nice if the deleted commits get moved to some archive outside of Gerrit instead of being simply removed, to ensure that if anyone else is interested in these commits, they could be restored. A bit later I discovered that only the "drop ROMCC" ones were removed - so not much has been lost in this particular case - but I'm worried that a more significant removal could happen in the future. In example, if your Gerrit gets hacked, or simply forgot to log out on another PC and someone malicious removed a few changes, there should be a guaranteed way to restore them.