A comment above is one of the few I’ve seen referring to multiple accidentals on one note. For an advanced just intonation score, that is pretty much essential—because creating combination glyphs means 100 or 200 of them in some cases, there being theoretically no enharmonically equivalent notes where the prime numbers don’t mix. Even if there are practical equivalents (especially in the 12,000 EDO possibility), notating equivalents won’t likely make sense.
The old notation program Lime supported multiple accidentals. It doesn’t seem like a difficult concept: you add/subtract the pitch offsets for each accidental. That is my big request, which I hope makes good sense to Steinberg.
Meanwhile, Dorico has enabled me to write (and hear) music in EDOs that I’ve been unable to produce for quite a while.