While it’s true that I reported that 2/3s of the issues raised in the spring 2018 audit are resolved, that’s only a partial representation of the overall state of Gutenberg’s accessibility. There are still a lot of issues that need continuing work, as well as new accessibility problems that are continuously introduced as features are redesigned or introduced. That 2/3s resolution only encompasses the issues raised within the first few months after Gutenberg was released, and addresses nothing at all in the features developed since then.

While Gutenberg has decent accessibility in comparison to many similar editing environments, I would be hard-pressed to consider it something that can be recommended for any organization that needs people with disabilities able to work on content creation. The complexity and rapid pace of change has a profound impact on the ability to learn and use the system, even if one were to assume that the technical implementations were perfect. (Which they aren’t.)

I can’t make any statements that would be meaningful about the other content management systems under consideration; but if WordPress wants to be taken seriously in environments where accessibility is a legal, ethical, and mission imperative, there’s still a lot of work to be done.