I use a rotary knob for scrolling since I don't own a mouse

I'm glad someone else feels opinionated about this! It seemed to me that everyone I come across these days only knows "Natural"!

I use both a pc and Mac, as well as my phone and I just get mixed up all the time. Gives me something to think about.

At work I sometimes switch the scrolling over to traditional. Others get completely thrown out and cannot grok it! 😂

Natural, but I use a touchpad.

I noticed this in video games rather than on-screen text scrolling. Some of them had a weapon selection, but instead had mouse-wheel-down "decrease" the weapon slot, and mouse-wheel-up "increase" it. However, the game also used the mouse wheel for other things, thus changing it to my preference had some unexpected side effect.

In any case, mouse-wheel to scroll view works because of the mouse-pointer paradigm. Move both mouse-wheel and mouse in the same direction, and the pointer is further along the content. Move them in opposite directions, and the pointer tends to hold position relative to content.