[dylanb, a11y] @marcysutton: there is some figuring out to do for sure, but that is not an argument against it. In a new application, being developed from scratch with accessibility in mind, an extra div or two won't be a big burden. In a legacy project, it may break all sorts of code/CSS and introduce tons of "extra" work. The end result is that developers will likely leave out the landmarks (because they are not really a requirement to be accessible, they just make things nicer). Allowing multiple roles would allow them to get the added advantage of the landmark navigation with less effort.