I see your point. But because it would be interoperable with the developers and not the end users, so it’s still no dice for Google. The QWERTY keyboard is a go

I see your point. But because it would be interoperable with the developers and not the end users, so it’s still no dice for Google. The QWERTY keyboard is a good example of interoperability with end users (but not of copyright itself). So the courts would not give weight to that aspect.