The use of certain more modern materials for insulation is certainly easier to build with and thermally more efficient. I do get the impression though that the choice of materials, i.e. straw and hessian really are rooted in the past and inevitably elements of the hive remain based around the inventors previous 'national' & 'warre' experience, some of which don't seem entirely necessary in a long deep hive. I'm sure that a number of people will find the more 'romantic' ideas seductively alluring.