aybe because they want to demonstrate against something real?

If you allowed to hand pick your opponent you win always.

Take any fighter in
the world other than the F-22 and you have an aircraft that can be
detected by ANY radar in the world. You don't need to hang

The proliferation of stealth platforms was the reason why multistatics and
other counter LO systems pop up everywhere now.
I think you are missing my point,my point is that both stealth and counter
stealth technologies were known for more than half century and if push one them
you pull another too.
Classical technological push-pull example.
Before investing zillions of dollars in any military technology you must check
if a technology to counter your technology is already available.

How 'bout Flankers, Fulcrums and pretty much every other
NON stealth aircraft in the world.

They are going to accompany Raptors in Jurassic Park.

Good thing we're both.

Countries that cannot produce their own scientific talent cannot be classified
as Advanced Nations they are only Advanced Countries and as such are easy preys
for the Advanced Nations.