F-117s are still seen flying around...
Some of the claims for the F-35 are a little silly. My favorite is still from 2008:
"Simply put, advanced stealth and sensor fusion allow the F-35 pilot to see, target and destroy the adversary and strategic targets in a very high surface-to-air threat scenario, and deal with air threats intent on denying access - all before the F-35 is ever detected, then return safely to do it again."
Lockheed Martin · pr_aero_SettingRecordStraightonF-
And as I mentioned a few posts ago, the fact that the USAF is tipping billions into F-22 upgrades (and B-2 come to that) shows that the professionals know that these claims are invalid.
But to make them in public, with the goal of monopolizing the combat aircraft business, so that you make tons of money while combat pilots put life and limb on the line in a non-invulnerable jet that you bamboozled politicians to support... that's not good at all.