Most western airlines have seen that the travelling public will accept lower standards and have acted on that. The "low cost" model (not really low cost as unless you get the first few tickets advertised at "from £19" or whatever, you end up paying the same as full service airlines after you've paid the booking fee/credit card fee/check-in fee/baggage fee and any other fee that the airline thinks they can get away with. This service is actualy "low overheads" or Low expectations" and the US and European majors think they can get away with it. If you want more, you have to buy a Premium economy or business ticket to get was what standard in the past.
However, as mentioned, Asian carriers generally still offer the full service. The likes of Thai, Cathay Pacific, Singapore, Malaysian etc still offer a service which is way ahead of the Western standards. On a recent Thai flight, I was treated to an economy meal which was as good as western business meals and the cognac bottle came out after dinner. And this was the relatively short sector between Hong Kong and Bangkok.