Yep. The question was, is the "I can analyze and tell you if I can use this tool to get work done" knowledge deep enough for most work? Or is it essential that

Yep. The question was, is the "I can analyze and tell you if I can use this tool to get work done" 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'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't know where the line lies honestly.