It's even lampshaded in the transplant Fic where I.S. character lived in Strangereal (Ace Combat's fictional world), I.S. doesn't exist.
Tabane's VERY EXISTENCE already caused all sort of mishap, started with 1995 Belkan War all the way to 2045 Corporate War... 50 years full of conflict triggered by a girl's
engineering notebook, who would have thought?
Exhibit 1: this motherfucker
1. Abnormal performance and durability WITHOUT the trick below.
2. Total immunity to guided weapon and bullets (except the intake)
3. Perfect radar stealth
4. All sort of supertech weapon in such small package, pure wankery.
No one else can recreate the second feature, ever, and the rest is nerfed greatly anyway. The second unit is pure joke, just a souped up Berkut-Eagle Hybrid (still a great plane, but seriously).