In fact, with the release of both OS X 10.10 “Yosemite” and iOS 8,
the quality of many accessibility features has reached a new
all-time low. AppleVis has a great summary of current problems in
iOS 8. But let me give you two examples.
The first problem is so obvious and easily reproducible that it is
hard to imagine Apple’s quality assurance engineers didn’t catch
this, and that is on the iPhone in Safari, when going back from
one page to the previous one with the Back button. When VoiceOver
is running, I haven’t found a single page where this simple action
did not trigger a freeze in Safari and VoiceOver. This was in
early betas of iOS 8, and it is still not fixed in the 8.1.3
release several months later.