Bending down to check the height of the flame on your gas stove may be the only part of the cooking process that has remained unchanged for nearly 200 years. amirite?

Not with induction cookware

Sausage over a campfire is still a thing, but you're probably right about indoor cooking unless you count the cooling process in which case pies have been sitting on the windowsill for probably millennia.

I use gas but I use the dial as a gauge to the heat of the flame. I rarely look at the flame. I can't remember ever checking it by eye but I won't say I never have.