Comment by WJW

This question is similar to asking on a car forum when using a 40 foot lorry will be the default starter car for everyone. The answer is "probably never" because while it does offer superior cargo transport scalability, the tradeoffs are not worth it for the vast majority of users. The question is posed like distributed databases have no disadvantages over non-distributed databases, but that is simply not the case. Clustering introduces all sort of problems, from network splits to slow(er) joins across nodes.