There had been 4 different coupler-systems in chromogenic dye-formimg.
When you speak of the "Kodak" system you should distinguish between the Kodachrome and the Ektachrome system.
All four systems had advantages and disadvantages. As you already hinted at, the Agfacolor system yielded the economic advantage of being free accessable, free of royalties and being published to a certain extend.
Nevertheless many manufacturers went the Kodachrome way.
The end of the Agfacolor system was for a part dictated by changes on the consumer and processing-industry side. Within this strive for standardisation the system to aim at was set by the world-market leader: Kodak
Agfa changed over to the Ektachrome system quite late. Other manufacturers even later, some never.
The reason for changing resp. not changing has to be looked at with every manufacturer apart as the situations varied.
Last edited by AgX; 04-26-2013 at 03:40 PM. Click to view previous post history.