Is it enough for a single-use tag to have a wiki excerpt to save it, or does it need to have a full wiki?
in my experience on Database Administrators (it may also be true elsewhere), there are many single-use tags that people have added (typically brief) excerpts for, but not full wikis.
If having an excerpt (only) does save a single use tag from automatic removal:
Should users with the appropriate privileges reject excerpt-only edit suggestions on previously-blank tags to allow these pointless tags to expire via the automated process?
Should moderators (actively or passively) remove excerpts on single-use tags so they can be auto-deleted? At least until moderators become burninators, if they ever do?