Did you just, like, fire up your old analog oscilloscope to prove a point?

Thats kinda my main scope i am poor like that .__. I grabbed it out of the trash a decade ago and it worked fine…bonus is the nice smell of old transformer isolation that emerges from it.

I think this effect should work too on a digital one, its basically just 2 audio signals displayed as X/Y mode.

A good digital scope may, the cheap ones, not so much. Analogue is king for these.