I don't agree with Mafoo's argument about cost-benefit at all. The vast majority of people, when they come round to building a house, especially a family home, choose to build it in a traditional style. People opt for the nostalgic idioms of pitched roof, wooden floors, bow/bay windows, fireplace, etc. Furthermore, often people will opt for modernist furniture inside a home that has a traditional facade. And as other people have mentioned, often people mix antique furniture and modernist furniture in one room -- something one would never do with clothing (without looking absurd).
Also, it is not true that in general people "like modernist chairs and houses, but classical clothes". It's something very specific to this crowd, i.e., people who really enjoy finely designed and crafted things. I think that's all it amounts too. Classical clothes look beautiful and involve craft and design that I can really get my kicks from. The same applies to some modernist furniture. The chronology and cost-benefit is basically irrelevant to me.