Yep, I'd rather take the person who says "I've never worked with Elm but I've heard it does X, Y, and Z well because those are things I've always found lacking in [insert JS framework here]" or even "I've never heard of Elm, but based on your description it sounds like it might mitigate X, Y, and Z problems because of [reasons], cool!"; over the person who says they've used Elm before but gives vague answers to follow-up questions (even if they aren't lying and have actually used it).