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If <user-avatar> starts to provide something else, and depends on compiling a code base to alert that it's breaking something, an automated test(?), then that suggests everyone's working blind and hoping for the best while the application development methodology's broken.

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Have you ever worked on (or with) a component library for a large code base? When updating the library you can't possibly manually check every single usage of every component.

I mean, depending on the CSS, things might already break if the <img> suddenly needs to be wrapped inside a div etc.

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