After discussing this the past few days with a couple of folks, yes, I don't think maintaining the currently incubating Usergrid ( https://usergrid.incubator.apache.org/) will be possible.
Basically, how would you do what are essentially container collections of arbitrary runtime-definable UDTs? With everything in a virtual keyspace? Think about how we got the mongodb emulator working. Can you really do this with CQL? Apigee is currently running several instances of this system at scale for a number of very large clients. The main public cluster behind the AppServices product has "many tens of thousands" of tenants. Again, in all seriousness, is this dynamic a model possible via CQL? Granted, we may be an edge case at this point and maintaing a large chunk of code solely for that type of function is just bad software. Hence my desire to assist with https://issues.apache.org/jira/browse/CASSANDRA-6846.
