Guess this might become some sort of tracker.
It seems the WikibaseSolr extension is somewhat abandoned (no changes since January), and with Wikimedia choosing Elastic Search to replace Lucene, and also the solr cluster at some point, it would make more sense if Wikidata used Elastic too...
Version: master
Severity: enhancement
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=54049