> By large casing only makes sense in the context of latin and greek derived alphabets (both of which developed lowercase/cursive typographies in the middle ages).
> As such I struggle to imagine a scenario by which a future Unicode version or lack thereof would have a significant impact on anyone's non-tailored case-folding.

And despite of that different accented versions of æ are still missing from unicode, same goes for œ, not to mention that fused ar is nowhere to be found. All have upper and lower case versions of it.
I don’t think it is unreasonable at all to think that it might change.