Portablity isn't even hard. Some maintainers just have a tendency to get huffy and say "but I've always used Linux, so all Linuxisms are correct" - I think this

Portablity isn't even hard. Some maintainers just have a tendency to get huffy and say "but I've always used Linux, so all Linuxisms are correct" - I think this tendency derives from GNU's entirely deliberate use of embrace-and-extend tactics with its ecosystem of GPLed code. But that's OK. We have a ports tree, we don't need upstream.