My rant is that I was doing just fine until I read this article.
Cast iron works best with induction stoves. She’s probably afraid it would scratch the glass. Mrs Magill had the same issue when we first got a glass top stove, until I showed her that glass has a Mohs hardness of 5.5, and iron and steel are between 4 & 5, so glass with scratch iron, and to pleeeease stop using my knives on that glass cutting board.