Earlier quoted context omitted.
Thought experiment: imagine fixing your car engine by tabbing around a little viewport.
People do it now, if we're talking about CAD software of an engine model. I'm not sure they're clamoring for more 2d monitors. I think being able to reach into the model in 3d space is probably more natural than mouse clicks and manually moving viewports around.
Your shortcuts are your bread and butter and you are super fast.
Perhaps for sculpting.