I'm really starting to dislike this notion of "Oh well Elastic deserves this since they build on an open source project, Lucene!" There are two main difference

I'm really starting to dislike this notion of "Oh well Elastic deserves this since they build on an open source project, Lucene!" There are two main differences here. 1. The scope of the change. My understanding is that Elasticsearch may use Lucene under the hood, but extends it in ways and for use cases that Lucene was not designed for. The same can not be said about AWS taking Elasticsearch and running it as a drop-in replacement. 2. Perhaps most importantly, Elasticsearch didn't build on top of Lucene, and then decide to call itself Lucene. If you think there is so little differentiation between the product you built and the product you built off of, that you are better off highjacking the name, then I question if you made any meaningful differences.