Look clearly you have zero understanding of how enterprises work. And given you have added Hazelcast which is a distributed in-memory solution in there shows you have a poor understanding of technology as well.
It is all about support. Big companies have operations teams who manage infrastructure and deployments. They aren't experts in databases and so want to be able to ring someone who can help them when the times get tough. 10gen understands this and have a great support story to talk about hence their popularity. Most OSS don't.
It is all about support. Big companies have operations teams who manage infrastructure and deployments. They aren't experts in databases and so want to be able to ring someone who can help them when the times get tough. 10gen understands this and have a great support story to talk about hence their popularity. Most OSS don't.