I was rather interested in OrientDB but the lack of any quality ruby drivers was a roadblock.

I have just checked again - There are currently 3, which is much better than I remember.

* One uses the Java driver via JRuby only.

* One hasn't been updated since 2012

* One is HTTP which isn't the end of the world but it is not an official driver which doesn't inspire a lot of confidence.

...considering this is true, than why you hear of so many people using Neo4j and so little about OrientDB? I mean, I am really curious... is it just the "started effect" where people just stick with the first thing that seem to mostly work? (the same thing that makes MySQL more pupular than Potgres for example)

I tried some time ago a 1.x version of Orient in comparison with a Neo4j of the same era, and Neo4j proved to be very simple to just jump right in and start querying around... whereas OrientDB had so many interesting concepts but it took so much time to digest them and decide what should I use... and in the end it wasn't relevant for me as I just dropped the hole graph db thing and went for "dumbest" solution of Mongo + MySQL ...so I don't have any authority to talk about this really :)