All of that said, I can use the same techniques stepping down from a 5kW to a 1.8kW unit. Once you get above ~2500 watts on induction it doesn't feel like it's moving the needle that much. I rarely used the 5kw boost mode. It was actually too powerful in most cases, even stir fry if you weren't moving like a mad man.
Moving from gas or resistive to electromagnetic seems like the actual magic trick.