My opinion only. It would be wonderful if every CFS brigade had a selection of appliances at their disposal to suit every concievable emergency situation, but this is the real world. I feel there is still strong need for 32/Pumper style appliances, particularly in urban areas. Ultimately even the concept of Scanias for Urban CFS brigades should be worth consideration, as long as these same brigades also have a suitable 4WD appliance in the shed. Our brigade once had the combination of a 32/Pumper and a 24, (which was later replaced by a 24P snail). There were times when the 32 was required to attend off road jobs and from what I understand had absolutely no problems accessing most of the grass, scrub, paddock, woods etc in our area. Even some of the heavier going areas of NP's and gorges have fire access tracks quite suitable for 2WD. The advantage of 32/Pumpers being usually faster and more agile and can carry more equipment.
I thinks CFS is on the right track with 14, 24, 24P, 34, 34P and Pumper/Rescue adequately covering all risks.
But we can still dream that one day our brigade will have a Scania and a 34P in the shed. I won't hold my breath though. (We would settle for a nice type 2 instead)