JavaScript boy and “lovely thoughtleader” 
he/him 
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People who want it to block production builds will just run their lint command before. Not everyone has their editor configured correctly for a project, errors may not necessarily be shown, it's an additional way before their changes hit CI and they release they needed to run X.
create-react-app has good prior art for showing lint errors as a seamless part of the packaging experience. I don't know where I fall on the spectrum of ignorable errors since I'm undecided if there should even be separation between "warnings" and "errors".
