I would suggest making it send a weekly or monthly message to admins which summarized:
Disk space growth rate (uploads and backup size)
Estimated time until disk doesn’t have enough space for the next update or backup (based on growth rate above).
Bounce count and growth rate (i.e. are ISPs blacklisting you)
Even a rudimentary correlation between event log errors and plugins, would be helpful.
Some kind of indication of the “distance” between the instance and the current git version, particularly if it picked up on git changes to major bits like Ruby, or Postgres, or Docker, would be nice.
Even if all it created was a plain ascii report which answered the usual support questions (RAM, Swap, disk space, Version, docker version etc) that would be a start… Many of us running Discourse aren’t experienced sys admins, so we end up posting support threads of the form: “Something’s broke, please help.” to which the response is “How much disk space have you got free?” which prompts “How do I check that?”. Having a report that covered the most salient points which you could include in your “Something broke” message would save the people answering support questions some time.