Not sure what else they could say, when 95% of FastAPI features come directly from Starlette. Again, the code on github speak for itself. As for the remaining 5%, that's basically pydantic and the swagger / openAPI stuff: questionably useful and very easily reimplemented if need be.

The way I see it, FastAPI stole much of the recognition Starlette deserved. I find it a bit sad. Starlette is where all the async magic happens.