Yes I'm aware of that.
I don't want hw specific features like new shader instructions or binding uav to any shaders,.. what I need is , some d3d11.1 api features that are likely currently exist in the driver implementations.
For example I need MapNoOverwriteOnDynamicConstantBuffer for my application, which the OpenGL equivalent (glMapBufferRange, glBindBufferRange) existed since v3.0. And when I call for example VSSetConstantBuffers1, Debug layer complains that "This current driver does not support constant buffer offsets".
And this is what says In the d3d documentation for VSSetConstantBuffers1: "This feature is always available on new drivers for feature level 10 and higher."