Graphql is really suited for aggregating disparate data sources and making them look unified. You dont need to use ot that way, but that is the main value prop.
The downsides that killed it for us was that performance characteristics seemed less clear, and ever replacing it would be a nightmare due to its unstructured usage.
Things that were simple in REST (like rate limiting, capacity planning, authorization) seemed more difficult, and we didn't need the killer feature of it.
It is an interesting tech, but you are probably better off starting with REST and adopt gql on top afterward if you need it.
