Comment by Beijinger

No plane is invisible. It is totally unclear if Russian or Chinese technology can detect them. I mean, there is one way to find out....

This being said, should the "invisibility" fail, it becomes a plane that can't dog fight, cant fly very high, can't fly very fast, can't carry a lot of load, needs an insane amount of maintenance (10h per 1h flight) and is expensive. Big bet!

Superiority comes to mind: https://en.wikipedia.org/wiki/Superiority_(short_story)

Fun fact: German stealth figthers: https://en.wikipedia.org/wiki/Horten_Ho_229

https://en.wikipedia.org/wiki/MBB_Lampyridae

The modern background of stealth figthers comes from the soviet union: https://en.wikipedia.org/wiki/Stealth_technology