The Wikidata team is willing to pick this up as it has considerable storage implications for Wikidata.
We need to determine:
- How much work is needed
- Do we need to remove data retrospectively?
- If yes, does this need to be communicated and maybe decided after community consultation?
- Do we need a feature switch? like a config variable.
- We need to remove old code after one release.
- The maintenance script needs to remove old log entries and that needs to be added to update.php