Background: I initially proposed (a while ago) to merge -qa, -releng, and -devtools into -releng. We only did the -qa part. But we also duplicated (most? all?) of the -devtools wikibugs notifications to -releng.
Now: The signal/noise ratio is too low in -releng and I think we can decide to keep -devtools for the foreseeable future (especially with the Gerrit migration on the horizon).
Next (my proposal): Remove any phab/gerrit/migration/etc wikibugs announcements from -releng (make sure they're in -devtools).