My interest in GraphQL has a few different layers: it's a different querying paradigm, in the same way that REST and RPC paradigms are different; what are the p

My interest in GraphQL has a few different layers: it's a different querying paradigm, in the same way that REST and RPC paradigms are different; what are the pros and cons? How do you optimise services throughout your stack to handle load that is - in theory - of an unknown pattern, but in practice, will be of certain shapes? Furthermore, if we divide SOA/microservices into several tiers - separating UI services from backend services - does GraphQL fair better than more traditional paradigms? How do we "merge" GraphQL schemas? Whilst I agree it's niche now, not many new paradigms come along and not many of them have so many questions that can be asked, so there has to be something interesting there.