I've always considered the Series III to be the ultimate Land Rover anyway, combining the off road ability, cost effective nature and relative simplicity of the machine itself. The Defender improved on the dynamics and with advent of computer integration the 4x4 system in now better but as a working vehicle the SIII remains king of the historic Land Rover vehicles.
I generally live in rural area and Land Rovers are everywhere in various states of repair and use. From the well to do chap who own a considerable amount of land in his new shiney black 110 to the numerous farmers who run about in tatty SIIIs or 1980s Defenders. It barley registers how old most of these Landies are until I spot one with B&W plates and it strikes me many of them are still going strong after 40 years of hard labour.
I for one can not see a farmer going out and buying one of them as a work vehicle, these are the sort of people who spec their cars with steel wheels, they won't want bits of plastic and bizzare styling efforts. They'll want something that looks like it was made out of sheets a square metal, rivited together and given a going over with army surplus paint!
They'll also want the ability to hose down the interior, and they'll want to throw things into it without interior styling motifs breaking off, and at least some will want to bodge the electricals to power a drill or a spot lamp.
To sum up, the Defender isn't broken, it still sells well despite not being cheap and is popular with its customer base, why fix it?
Just more Britain desperately trying to be a modern country to "match the rest of Europe" when in reality most tourists only want to visit Britain to look at the shit it did years ago, (which we are desperately trying to hide/destroy, bye bye Routmaster Bus and FX4 Taxi and red phone boxes, you may have become national symbols and recognised the world over but you don't fit into the picture of modern Britain) and most modern brits like cutesy shops in medieval buildings where they can buy a cup of tea with a hint of Ye Olde Englandshire.
I await the day where Britain is simply an awkward mess where it has a nice modern sheen that is completely unlike what anyone actually expects fom the country misplaced amongst its historic buildings and the waving monarchy as it grinds to halt as a place that is stuck between the image people have of it and the country its people are told to want... Oh wait...