EDIT: The F-15 is already a very formidable fighter, it even shot down a bloody satellite, F-16 is also a proven and very effective air superiority fighter, so why the replacement? Our air force is already the strongest in the whole of ASEAN so i see no need of full replacement, sure we can own an F-35 but maybe just a few for squad support.
The F-15 is the only zero losses fighter ever built. As in no one has ever shot one down. And that includes all of the foreign air forces (particularly Israel) that use them. Compare that to 104 confirmed air to air kills, there's absolutely nothing an Eagle hasn't killed, including a fucking satellite and that one time a Strike Eagle nailed an in-flight Iraqi helicopter with a bomb.
Don't get me wrong, a few nations home grown fighters claim to be able to tangle with one in maneuverability stakes but can't stay close enough for long enough cos as soon as one gets into trouble, the driver just lights the burners and disappears.
But that in itself shows how good it is. It's never been in a situation sat in someones gunsights and not been able to escape.
The secret to that of course is due to its central design feature, a positive TWR at combat weight, so no matter what attitude or situation (even nose up) it will
always accelerate if you stand on the gas.
And you're right, it is still at the top of the generation 4 tech tree (despite being about 50years old now) and is only technically outclassed by gen 4+, gen 5 and 6 craft cos it lacks vectored thrust and has the stealth abilities of a Vegas neon sign. It'll still outrun, outclimb, outlift and outfight most comparable aircraft in the world right now except the upper tier of Russian / Chinese fighters and of course the F-22.
Same with the F-16. Everyone (well, not
everyone, but you know what I mean) uses them for a reason. They're simple, incredibly capable and will do absolutely anything you want from air defense to strike competently without breaking the bank.
I think people want the F-35 for one simple reason. It's the only 5th gen stealth capable fighter available for export. You can't buy Raptors, you can't buy whatever toaster the Chinese are building and you can't buy (weird considering everything else is for sale) the Russian equivalent (cos it's not even in service yet). And because of just how difficult and ruinously expensive stealth still is, most other nations just don't have the time, money or facilities to make a 5th gen for themselves.
Bearing in mind the US and UK are already planning generation 6 aircraft (Tempest), that means they have to go to the US, cap in hand, and buy the F-35, or be a generation or 2 behind.
dont know really, too much variables unknown for a perfect answer. F-35 is stealth, but maybe it's discount stealth unlike the F-22, and it's loaded to the brim with capabilities in order to cover the requirements of other countries
The 'stealth rating' I'm not sure of. I have heard certain nations claiming to be able to track Raptors using certain bands of search radars, but it is a 15year old fighter. And those claims are likely bullshit.
Likely F-35 under certain conditions is 'stealthier' but there are problems with internal stores capacity in stealth mode. So much so that there is a 'non-stealth' set up with external pylons and missiles that'll basically turn it into an expensive F-16 on a radar screen.
It will have a few more capabilities over the Raptor, things like carrier work, VTOL etc, but they're both 'multi-role' so aside from how and where it parks, the job specs aren't much different.
The fact that the US is not replacing any of their fighters with the F-35 doesn't necessarily mean its bad, if that's the case, why didnt the F-18 replace the F-15?
Different job titles, different branches want different things. The F/A-18 is almost exclusively used by the USMC and US Navy as they wanted a cheaper fighter than the F-14 to stick on a carrier deck. Think of the Hornet as the Falcon to the Tomcats Eagle. They were designed to compliment, not replace.