Thanks for this information [I mean the facts, this forum is not intended to spread opinions on third parties].

After, checking, I was surprised myself. The deviation from the JE has occurred since v0.5.0. However, the following file:

https://github.com/JanusGraph/janusgraph/blob/v0.6.0/NOTICE.txt

Still mentions:

* Oracle BerkeleyDB Java Edition [https://www.oracle.com/technetwork/products/berkeleydb/] (see license below)

This does not seem correct. Can anyone clarify?

Also relevant:
https://www.oracle.com/database/technologies/related/berkeleydb/berkeleydb-licensing.html

Best wishes,    Marc