[Frummy]

>Enough allusions to a nebulous solution that must surely somehow exist. How would you represent Excel to a user that is not sighted?

A voice presents the information structurally top-down recursively as needed. That's it. Braille displays may also be used. If the excel is unstructured, an inclusive organization makes sure such files are documented. Soon an LLM may describe the structure. And don't underestimate peoples intelligence if they happen to be alone without documentation, structure can be extrapolated. Let's not pretend things are impossible that aren't. A simple screen reader gets a lot done here.

>surely the goal is for the utility to be the same?

Not for the methods to be the same, the goal is for the output to be the same. To consider the majority's way of doing things the correct way is sort of discriminatory. To cram people with different needs into an existing framework doesn't always work, rather you have to meet their needs so they can provide the same value in alternative ways.

I like your point excellent job you're right of course it's a difficult problem. I won't be able to reply any longer. I hope you may generalize an appreciation of the willpower of people with functional variations and not try and fit them in a mold rather give them alternative interfaces that they need to produce the same results