GL_NVX_linked_gpu_multicast cross GPU buffer transfer

There is scope for copying textures across from one GPU to another in the GL_NVX_linked_gpu_multicast extension but not for copying general buffers?

I suggest using a compute shader on one GPU and then copying a general buffer or subset of it across to another GPU is quite a useful case for this extension rather than just being able to copy textures.

Is there a chance of getting support for this soon?