The challenges of kernel-level development across different processor architectures in Unix environments

When you're on the other side of the fence, and working in the kernel, all the gory details which will heavily differ across platforms can no longer be ignored

Sometimes, the shortcomings of a given processor architecture can become a real pain in the arse

When developing software to run in a Unix environment, you will often be able to use the same system features and benefit from good developer tools, regardless of the particular platform you're working on