A 4th gen fighter jet stands no chance against 5th gen.
Point of having new and capable 4th, or rather 4.5, gen planes is not to have them go against 5th gen planes. 5th gen planes are expensive to produce AND to fly, that's why even US and China is still buying/producing 4th gen planes. When US air force asked the Congress for permission to retire 150 aircraft, neither F-16s nor F-15s were included in that list. You don't need to use an F-35/J-20 for every mission, sometimes an F-15 or J-10 does the job just fine. Why put extra hours on the engine and the frame unnecessarily, and for a high price? Smaller nations that barely have an air force worth mentioning might transition all the way to 5th gen but for nations that have to have a big air force for diverse missions it is neither economical nor logical.
One should not rely on others and not spend a cent more in the USA & Europe. Instead, use the money you would pay for the Eurofighter/F-16 to invest directly in the Hürjet & F-16 Özgur I & II and accelerate them to the absolute maximum.
So that everything is completed in 2-3 years at the latest and all Turkish F-16s are upgraded to the equivalent of Block 70.
And 10 additional Hürjets will be available as Block 0 for TCG Anadolu.
Then 10 more Hürjets every year, and we would have a buffer until KAAN arrives.
Then neither Greece nor Saudi Arabia & Co would have a certain head start.
The KAAN project can then be completed in parallel without any pressure, and at least 3-4 prototypes can be produced by 2029 to correct all errors. The first Block 0 could then be produced directly with its own engine in 2030.
Until then, there would also be the opportunity to make minor design changes to the aircraft, and additionally to get an improved version of MURAD AESA radar as version 2.0, and improved AVIONIK and the radar-absorbing coating/painting from the findings of the Anka 3/Kizilelma and F-16 Özgur and Hürjet.
Hürjet is a year or two away from starting its production as a trainer. There isn't even a proper light attack configuration yet, let alone a naval version. It isn't even a naval aircraft, there are multiple parts/systems that would have to be changed for it to be one. And TCG Anadolu itself would have to go through major changes to be able to use Hürjet, hell as it is, it won't even be able to use KE.
And all of these doesn't just take money, it also takes time, resources and manpower. What makes you think that only thing slowing down Hürjet and Özgür project is money? You are making a lot of assumptions based on nothing but it'll all be faster if we just throw money at it. There are only so many designers, engineers and technicians with different expertise that can work on these projects, just as only so many companies, which are also handling other projects.
