This leads me to the crucial question: Is the performance of Wikibase sufficient for such an amount of data?
Does someone have experiences with inserting Wikibase data directly into the database? That was one suggestion a received on how to import 80 million+ items into a Wikibase installation.
I have tried to import the data into the page, text and revision tables - as I have done it a few years ago on a normal MediaWiki installation. However, Wikibase seems to use more than these three tables.
Best regards Jesper