Thank you for sharing. I'm in research that is somewhat attached to the technology side and find 2) particularly interesting.

Did you ever look into electrotactile tongue display units? What is your opinion?

I'm curious about what neuralink will present soon. Musk mentioned "atari graphics" recently, so they probably will for now only focus on generating phosphene-based crude bitmaps in the primary visual cortex (which has been demonstrated to work years ago). I can't know what they are up to and believe / expect they are internally more ambitious about stimulating the higher visual system. But if it boils down to the phosphene bitmaps I expect TDUs (which have FDA approval, already seem to work well and don't require invasive surgery...) to become part of the discussion.