If you looked at the gov.uk page [1] that he linked, it is clean and readable. It doesn't look hard to me to make, and I don't think it is lacking functionality.
I'll grant that writing web-apps without a framework is going to be harder for many people (especially with all the fancy features that are expected now days), but that is not the point of this writing. This is an argument that the web (especially government services) should be usable on limited devices too.