Screen Magnificatoin

I think there is much more that can be done at the content level.

Issue 1: Horizontal scrolling has been shown repeatedly to slow reading and
impair comprehension.  There is a small population of people with severe
and profound low vision who use this technology to read, although
text-to-speech is overwhelmingly preferred at this level of vision loss.
None the less WCAG WG has decided that screen magnification is sufficient
accessibility support for all low vision.  That is a fact.

Does it make sense to claim that a population that has profound difficulty
reading is really given sufficient accessibility support using a technology
that is well known to impair comprehension and slow reading? This idea may
pass the internal definitions of WCAG (Although, I do not agree.), but it
surely will not pass the "reasonable accommodation" requirement of the 1973
Rehabilitation Act, the parent of Section 508 and Section 502, that created
the US Access Board.

What will happen to the credibility of WAI when this assumption is
overturned in us court, as it will be?

That is the first issue. There are more.

Wayne