[rystsov]

I agree that CRDT don't help with data-scalability (eventually all data converge on a single node), just wanted to comment on the following phrase

> CRDTs don't help in the case that you don't want to deliver wrong answers

Usually when people talk about CRDT they assume that a client talks to a single node and then a background process replicate data to others node. Before this replication is done, if a client contact the other node they get "wrong answers". But nothing prevent a client always talk with quorum of nodes and do replication on its own, in this case we'll get always only right answers :)

However we still need to merge if we do quorum-ing. Paxos/Raft-based systems basically take optimistic lock then they quorum (see prepare phase) so they suffer from contention and need a leader to serialize requests (leader in paxos/raft is for liveness not safety). But with CRDT we always can merge so concurrent requests are not a problem and we can achieve better level of parallelism (request-scalability).