a) Inexperience. People 'know what they like and they like what they know'. In the same way people buy Bovis / Redrow noddy houses because they are familiar, they think that 'modern' architecture is intimidating and different and odd. I would urge you to watch the three part series of Alain de Botton called "The Perfect Home". It is based on his book "The Architecture of Happiness" and it took a number of families who were set on buying their next noddy house around decent 'modern' houses - as in, properly archtiecturally designed stuff. Before visiting, they all pretty much recoiled at it, said 'urgghhh' - generally expressed the opinion you are putting forward. De Botton took them to visit a few of the schemes in the flesh - work by S333, MVRDV in Holland. Their initial disgust and distrust of 'modern' architecture soon changed. They were impressed by the volumes, how the rooms were arranged, how cheap the buildings were to run, how much light they had, how warm they were, how easy to keep clean. What I'm saying is a huge amount of phobia is borne out of the unknown; I shall watch it
b) Only the good survives. There is a lot of bad contemporary architecture around. Same as it ever was. The reason people like the 'old' stuff is that, as many have pointed out, only the 'good' old stuff has survived - the huge swathes of bad 'old' stuff has been destroyed. Remember - that was 'modern' architecture at the time it was constructed and people hated most of that then, in all likelihood. Throughout history, only a very small proportion of buildings or typologies will be viewed as successful and retained - the vast majority of our built world is demolished within 50 years and replaced with something new(er); very true, fair enough. however, I just have to ask you - does this not worry you? I certainly would not want to be living, in 50 years, in a city that is entirely 'modern' (whatever that means). I lived in singapore for a bit, and among my peers we were almost universally agreed that it really does lack a certain 'something'. It is almost a bit soulless. It's hard to pinpoint exactly what I meant, but surely you must appreciate that...
c) Romanticism. A large number of people who like developments like Poundbury think that it somehow harks back to 'the good old days' - you know, the days when a bit of casual racism and sexism didn't raise an eyebrow down the pub. So a lot of the love for that 'faux' vernacular / historical style of building is borne out of Britain's inherent conservatism (with a small 'c'). We are a nation of imperialists, we like our buildings to keep us in our place. Contrast with the Netherlands or Switzerland - more democratic. They - rightly - view architecture as an ongoing link between history and the future. It is a continuous, ongoing process - they don't think good design stopped somewhere around 1850 and build in the way they did then in those countries. And they have fantastic architecture - far better on average than modern buildings in the UK. So perhaps the conservatism of the UK dilutes the quality of new buildings here, as planners are always trying to appease Middle England and therefore watering down what may have started as a good design? I have seen it many times in my dealings with Councils. You just end up with a horlicks if you're not very careful / assertive / bold; have to agree with you here. coming from a legal background, I find the planning laws very strange. I would agree with you that the councils like to go for a 'happy medium' perhaps that ends up appeasing no-one. In that respect I actually would like to see planning loosened - which following the recent reforms, as I understand them, will achieve. However I have to say i've been to Switzerland and the cities there are absolutely beautiful... because they have almost untouched old architecture in almost all of them! I can't actually recall seeing any modern buildings in any of the city centres I went to0 (zurich, lucerne, basel) where is this architecture you speak of!?
d) Ignorance. The majority of people have no concept of economics and don't understand the complexities of building regulations, how much materials cost. How do you construct in a 'traditional' way and still ensure you pass Building Control? this is one axiom of the 'modern vs 'old' debate I would like to see substantiated. I refuse to believe that many modern buildings are actually that much more expensive comparatively than 'old'. How can a block of bricks, i.e. a traditional redbrick London 'mansion block' cost more than a modern block of flats? How can the big headline projects, i.e. any skyscraper really cost less than some of the old 'grand' buildings in London. If you suggest this is down to a) materials b) craftsman this surely is incidental to the changing tastes and thus demands in architecture, which have reduced the supply of any classical architects (due to the brainwashing in architectural schools) and craftsmen etc. Likewise, the associated lack of demand for the materials i.e. stones have driven up the costs. You mention basic principles of economics and clearly applying simplest concept in that field, supply and demand, must factor into the presumed 'expense' of building in any 'old style'. If you could provide some documentary evidence of, for example, the cost of constructing the old Baltic Exchange vs. the Gherkin, that would go some way to clarify this!!
I could go on. But there are a few to start you off with.