I have played with headphone stereo sound and it really helped delineate musical conversation by separating strands/sources of sound. Perhaps hearing aides ought to try augmenting stereo separation or virtual surround sound (like VR glasses).
https://www.diyaudio.com/community/threads/open-wing-headphone-crossfeed-stereo-sound.391630/
https://www.diyaudio.com/community/threads/open-wing-headphone-crossfeed-stereo-sound.391630/
That doesn't work that way. The problem is, stereo and up/down location depends on more than just left/right, it depends on the short and long reflections in the room and the angle they arrive in the ear. That means, a conventional (even modern) hearing aid can help a lot but cannot provide the missing information. Yes, the crossfeed can stimulate and improve the location a lot but it cannot replicate unique sound location. That doesn't make it bad but it can't replace or re-create what's lost on information.
