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WordPress (WP) reckons its new-fangled block system is versatile
[1], giving the user flexibility and control over their site design, and to say more, faster
[1].
This is not my experience. I find I have to wrestle and wrangle it into submission before I can do anything I want to do. I have to switch into Edit as HTML mode frequently, and – worse – many of my blocks end up being Custom HTML blocks because I want to do something that doesn’t fit with the rigidity of WP’s assumptions.
A good user interface should be something the user barely notices, allowing them to get on with the task in hand; WP blocks block my vision and hinder my progress.