[jandrewrogers]

The Russian and Chinese air defense systems might detect but not target at a long enough range to matter. Those are two different tasks and fundamentally how stealth works in practice. Knowing an aircraft is out there does no good if you can't resolve a firing solution. Detecting at a range of 15-30 miles is a small comfort when an F-35 can carry anti-SAM missiles with a range of 100 miles.

There is also quite a bit of empirical evidence in recent months that the Russian systems do not work that well generally, since they seem to be incapable of defending themselves against non-stealth Cold War era US tech.