one of the biggest strenght of 3dsmax are modifiers, simple yet procedural approach. Yet, we have a lot of features in max that are not in the form of modifiers that will be extremelly more powerfull if they exist as a modifier. Some examples:
-Array as modifier.
-"Generate topology" (from ribbon polygon modelling). will allow to do changes on the base mesh, and see updates without a destructive workflow.
-Conform as modifier.
-We have "Extract spline" from an edge selection on editpoly. Having a modifier that does that procedurally based on Selected edges will give a lot of new procedural approaches.
-Boolean as modifiers.
-.......