Choosing between Poly and Mesh for modeling definitely worth to choose Poly. But, nevertheless, there are tasks, where the use of Mesh more justified than Poly. Despite the fact that Poly is essentially the evolution of Mesh, it has a number of significant differences and limitations in their work.
Poly Loop Soft Select – 3dsmax MAXScript, allows when working with Editable Poly object in Edge sub-object mode filter Soft Selection by selected edge’s loop.
Straighten Edge – 3dsmax MAXscript, allows to project and after it to place selected vertex/edges on the given straight line on the Editable Poly object, Edit Poly modifier and Editable Spline & Line objects.