“I don’t see using a proprietary CMS as an extension of W3C values, and it’s not clear how much more benefit to accessibility the proprietary options offer in comparison. W3C may be neutral on licensing debates, but in the spirit of openness, I think the organization should adopt an open source CMS, even if it is not WordPress.”

This an interesting critique, in the context of Automattic and wordpress.org taking a pragmatic view, and using proprietary software quite freely when it does the job best. I don’t criticise it for doing that, by the way. But, to take an example, wordpress.org uses Slack heavily for communication, rather than Mattermost. My personal view is that life has too many other things to think about for me to care much about that one way or the other. But it’s at least a little curious to read an article on the Tavern criticising external bodies for apparently having the same policy as the main bodies in the WP world have. It seems unlikely that external bodies are going to take such critiques seriously in that context?