I don't have strong feelings about S2/S3. I probably changed it because it's possible to disable RDD, therefore a workaround exists and unassigned S2 bugs lead to triage automation spam for our team.
Bug 1685666 Comment 9 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
I don't have strong feelings about S2/S3. I probably changed it because it's possible to disable RDD, therefore a workaround exists (which is contrary to [the definition of S2](https://wiki.mozilla.org/BMO/UserGuide/BugFields#bug_severity)) and unassigned S2 bugs lead to triage automation spam for our team.