For about €900, I booked an economy class ticket with Delta from Amsterdam to Buenos Aires via New York JFK. I had actually booked something completely different – not even with KLM.
In the long run, this business class will cease to exist, but it will probably still be used for a couple of years on shorter or less-relevant routes.
The “old” KLM business class can be found in all Boeing 777s that have not yet gotten a premium economy, as well as in all Airbus A330 planes.