After reading the Relay Modern announcement, it's not clear whether it will still require the "Relay API" or can use "Simple API"? https://code.facebook.com/posts/1362748677097871

@sdubois We will have an updated version of the relay vs apollo article ready in a few days . The short story is that Relay Modern still requires the relay api because of the pagination model. We will be able to simplify the api in other areas by for example removing clientMutationId. We are not yet ready to announce what the transition will look like, but two likely scenarios are 1) extend the simple api to accommodate Relay Modern 2) add a new simplified version of the relay api. No matter what we choose, we will do the transition in a way that doesn’t break existing applications.

Thanks 👍