Completely agree- when I got a nicer machine that had almost commercial level steam power, I was obsessed with how much microfoam I could put in the jug and ended up with a very marshmallow-y texture as opposed to latex paint consistency really required for good art. I think when upgrading to a machine that can steam larger portions of milk, showing restraint is important. I have found that practicing how much air to inject based with any given machine sometimes takes just as much practice. For my current machine, I only need a few seconds of air injection for an 8oz amount of milk.