> Elastic is derived from Apache Lucene, it’s unclear if anyone involved in its’ development could legally have made it more restrictive, though they apparentl

> Elastic is derived from Apache Lucene, it’s unclear if anyone involved in its’ development could legally have made it more restrictive, though they apparently are trying to. Actually, you can totally use Apache 2.0 code as your kernel and then make the whole thing a restrictive license. In fact, that's why we're having this discussion right now. Elastic just made their Elasticsearch/Kibana codebases entirely proprietary, even though they rely on Apache 2.0 Lucene as their kernel. Which to be clear is totally fine, I'm just pointing out the obvious.