Yep. The question was, is the &quot;I can analyze and tell you if I can use this tool to get work done&quot; knowledge deep enough for most work? Or is it essential that if you are a front end dev to at least have an in depth knowledge to analyze, explain, and predict where a JS framework will shine over another and where it&#x27;s pitfalls will lie. Knowing those pitfalls is also important because someday, it will bite. I remember not knowing about the pitfalls of python and default parameters being permanently set if given or passed a mutable argument. That bit me hard. I really don&#x27;t know where the line lies honestly.