Isn't GraphQL tunneled through REST already ?
I think comparing GraphQL and REST as two different technologies is a bit misleading. One can't replace another, because one is simply a higher abstraction transported over another: GraphQL is a Data Oriented Querying language with complete end to end management - but it uses POSTs and GETs through HTTP - it's REST with good tooling on both sides and in between !
It's also important to understand that GraphQL is very powerful as a data tool, but it would be an overkill for pretty much anything else. I've seen people bending it to make it act as an authentication API !
There are a few things that are common, but there are a lot of differences as well. There can be a hybrid approach as well, or standalone implementations too. That is why mentioned about things REST can be good for, and GraphQL not being a silver bullet. And totally agreed about the data tooling part, that is what it does best, and only using it as an authentication API would be a poor use of GraphQL.
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