[ucarion]

> Of course, if the argument is simply that it tends to be more challenging to manage performance of GraphQL APIs simply because GraphQL APIs tend to offer a lot more functionality than REST APIs, then of course I agree, but that's not a particularly useful observation. Indeed having no API at all would further reduce the challenge!

On their own, such arguments are indeed not useful. But if you can further point out that GraphQL has more functionality than is required, then you can basically make a YAGNI-style argument against GraphQL.