So here it comes. It is only a VALUE if WE say it is. So here is what I say.
I value
* Redis @ $4.5B
* Datomic @ $4.5B
* Riak @ $3.2B
* Hazelcast @ $3.0B
* HBase @ $2.5B
* Spanner @ $2.1B
* Neo4j @ $2.0B
* MongoDB @ N/A
Congratulations to MongoDB sales and marketing team (really!). It is a tough job to sell a trojan horse to masses.