FRatSTN -
And also LGS6753, you may want to distinguish the difference between architecture and infrastructure. Two very different things and of which the latter is vital for an airport to "succeed".
Of course architecture and infrastructure are different. But infrastructure is no use if it's in the wrong place.
Well areas like Herfordshire and Cambridgshire, as well as parts of Essex are very affluent areas and with them all having Stansted as their local airport
Many of the most affluent parts of Hertfordshire are very close to, and easily accessible to Luton, rather than STN. Consider Tring, Berkhamsted, Harpenden, St Albans, Hemel Hempsted and Watford, to say nothing of Hatfield, Welwyn, Knebworth, Stevenage, Hitchin and Letchworth.