Well, airside, they have followed fashion of providing Asian, Meze, Fusion, etc. When in transit at SIN this year, there were dozens of food stalls and not many that I could eat at! On the way back we went into a Lounge - and most of the food there was of the same category!
That's why I say that, in 50 years of 'Paxing All Over The World', I have only started to have problems in the last five years as the ground level food fashions have got into the airlines.