It about the cost of a 5th generation fighter. Where its going to get the technology for the 5th generation. The F-22 is highly guarded and very hard to get the technology from. Unless you have a high official in the U.S. Air Force I don't see Dassault for another 20 years getting that technology by that time the U.S. Air Force have something better cause of better technology.The Rafale is a good jet but its not a F-22. The Rafale is like a F-16D until they get the stealth technology that's where they will remain.I figured it was a matter of political will. The Typhoons are just becoming operational across various European air forces, and the French have just closed their first few Rafale deals. Currently, they don't really see the Russian Air Forces as a threat that their Typhoons and Rafales can't compete against, so I figured they won't be motivated to bring up their stealth designs yet.
I am pretty sure that somebody somewhere, be it EADS or Dassault, has conducted some research into 5th gen fighter designs. Just that theres no "urgency" in pushing that up when there's no apparent threat and a still adolescent 4.5 gen fighter production ongoing.