It's worth checking out for sure as it gives ultimate flexibility. That being said a simple content block system could be useful as a core feature but it seems to be not as crucial anymore.

I only use WP for CMS projects (as more and more people are), and I build dozens of sites per year. I choose to use WP because it seems to be the most extensible and offers many plugins which get me the functionality I need - except for the 'Multiple Content Blocks' plugin, which fails regularly with new WP updates. I have clients who now cannot edit their site. Not good - my clients don't care if it's a plugin, they see WORDPRESS as the problem.

Others here have suggested that one content block is enough - but maybe most people who only use one content block ONLY do so because that's all they have to work with. If they new it were a core functionality they would use it (them) more often.

It just makes building a NORMAL (non-blog) website so much easier. Not many REAL websites follow the 'one content block is enough' thought process...

Yes, WP has great features like widgets, custom fields, custom post types, but really often I think peole need a quick and easy way to have unique content blocks that can be wrapped in a div or something for easy CSS styling.

I think the fact when you search for WP and content block and find a plethora of different methods, hacks, and plugins to try and make this happen show the importance of it. My 2c anyway...

I agree that a plugin being premium doesn't really say anything about the quality of the plugin, though.

Perhaps it would be best to say, this is PREMIUM plugin territory?

One of the plugins I've found very helpful is "Advanced Custom Fields" its similar to the plugin "multiple content blocks" but with WAY more customization.

I don't think it would be confusing to the end user because multiple content blocks would only appear on the edit page when a custom template defines them.