The manual labor would be greater, yes, and that's a problem. But the original point of this thread was about dismissing the idea of Crater at scale, which is unnecessary 1) because it's an embarrassingly parallel problem, and 2) because you're probably not going to have a testable corpus larger than crates.io anyway, so the hardware resources required are not exorbitant for a company of Microsoft's means. Even if they could only cobble together 10,000 C apps to test, that's a big improvement over having zero.