If possible, I'd prefer to keep using APIs from 1960 instead.
When I read that I caught a hint at a problem. API design should not be an ongoing activity. People should design a new API and then we should all use it for a long time. If it's frustrating that POSIX is still used, you might want to consider that stability is the feature that keeps it around.
Perhaps it's time to reread Joel on "fire and motion":
I'm all for this Fuchsia thing, but they claim to have the experience to design something better so do that and let it stand. Regular software updates are actually a sign that you don't know what you're doing.