&gt; Some of the best folks I&#x27;ve hired or worked with had no experience with the framework&#x2F;language we ended up using. Knowing fundamentals is far more important.<p>This is what we <i>want</i> to be true.<p>It&#x27;s not how 90+% of job listings are written, and I&#x27;m not sure it&#x27;s how we hire.<p>Even if we addressed that problem, it&#x27;d still only be true at a close approximation: once a framework&#x2F;lib&#x2F;language becomes leaky enough, or has enough of a mismatch between its natural invocation and the problem domain, or carries enough of a culture of The Right Way To Do It™, then it&#x27;s true that experience with the tool matters... as long as the org is more invested in the tool than a solution that doesn&#x27;t have those problems, knowing the tool&#x27;s foibles and practices remains important.