Well, if you insert the loop, say, on one edit poly modifier, rename that in the stack to "Loop Cut" or something familiar, then add another edit poly on top of that, where you make further topology changes  As long as the subsequent changes you made to the mesh after that layer in the stack weren't dependant on that new edge loop, you can turn it off and on, to see what effect it has, or make adjustments to it.

Insetting can be made animatable, on an edit poly modifier, by pressing the animate ticker instead of model ticker in the parameters.  Doing this, you will be able to add further modifiers above it in the stack, then go back down the stack at any time, and adjust that inset width or parameters on that edit poly level dynamically.  You simply don't have that level of control in any other package, including Maya.

Regardless, I'm referring more to the tools for polygonal modeling.  Max has the deepest tools for editing edges and polygons of any application I can think of, since the introduction of the Graphite ribbon.  Maya certainly has a distinct advantage when working with Nurbs, but that's another story.

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