Is there an example of a system that provides too many primitives and therefore isn't a "good" system? How can systems designers strike this balance properly?

Does this imply that sufficiently complex problems whose solutions require an equally complex system are not worth solving under this model? Or is it really more that the system should match the problem in complexity?

I was just wondering how the performance of our OpenMP implementation of Page Rank / BFS in PA4 compares with GraphLab and Ligra. Are there significant benefits to their domain-specific primitives?