>I would seriously expect most beginners to have some idea about modulus, but next to no idea about key features.

As someone who began learning with Python, I knew many key features before learning modulus, and I don’t think I have even used modulus in a project yet.

>For general questions, I like things like "What are the key features of the language?" but I phrase them as "What are your favorite parts of the language? Least favorite parts?"

And, picking up where I just left off, this change in phrasing would have made a world of difference at the time haha.