We were hoping to get the accessibility-ready tag on WordPress.org added to this version, but we hit a roadblock, unfortunately. We’re not able to get that tag without underlining all links in the content area by default. Since we’re not comfortable with introducing a major design change like that in an update, we opted out of the tag for now.
I’ve been disappointed too that the tag hasn’t been added.
this is very high on our list, for WP to provide the tag the option would have to be in the Theme and I believe enabled by default which as you could imagine may upset a lot of users.
Once we find a good workaround i am sure it will be implemented.
In the meantime if you need we can provide some CSS to add link underlines.
Not really. I generally limit it to the entry-content so it only affects the links i added to the post editor. But the a tag should be fine – just be mindful that content via hooks or another plugin may be affected if they don’t have specific CSS.