I don't know if you're harsh, but one thing I've thought before I've clicked the link was "oh, another gui toolkit reinvention, I wonder how many times it will reinvent what's already invented and how many already solved problems it will simply ignore".

Well, I guess accessibility is one thing it skipped. It's a huge topic, I admit, so I'm not particularily surprised, but I think a better way for the author of this series would be to promote already existing huge toolkits that do have lots of functionalities built-in, including accessibility, like Qt for example.

That would be good also because already established huge toolkits have already answered a lot of important questions, questions which "modern" GUI toolkits simply ignore. New generations won't even know what we had when we were young.