Do you believe the fat ugly monster that is ElasticSearch would've had anywhere near its current adoption rates if it had a non-OSI license from the start?
It would've been completely overshadowed by some other Lucene-based wrapper or maybe some even better alternative would've come along earlier.
I built on Elastic early on over Solr and several others because it was open source and seemed to be better. I would have selected a different Lucene wrapper if I had known where Elastic was going.
