[rao-v]

I'm surprised this article doesn't provide a bigger list of calls that run on the gpu and further examples of what needs some cpu interop.

[LegNeato]

Flip on the pedantic switch. We have std::fs, std::time, some of std::io, and std::net(!). While the `libc` calls go to the host, all the `std` code in-between runs on the GPU.